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FDA-approved sharps disposal containers are made with puncture and leak-resistant plastic. The agency recommends that sharps - like needles, syringes, lancets and other devices used at home to treat diabetes, arthritis, cancer, and other diseases - be immediately placed after use in one of these containers. For more information about safe sharps disposal, visit www.fda.gov/safesharpsdisposal.

Фото Ивана Миско. Скульптура полет в космос. Photo by Ivan Misko. Sculpture space flight (5) by Ivan Yakimovich Misko

Spaceflight (or space flight) is ballistic flight into or through outer space. Spaceflight can occur with spacecraft with or without humans on board. Yuri Gagarin of the Soviet Union was the first human to conduct a spaceflight. Examples of human spaceflight include the U.S. Apollo Moon landing and Space Shuttle programs and the Russian Soyuz program, as well as the ongoing International Space Station. Examples of unmanned spaceflight include space probes that leave Earth orbit, as well as satellites in orbit around Earth, such as communications satellites. These operate either by telerobotic control or are fully autonomous.

Spaceflight is used in space exploration, and also in commercial activities like space tourism and satellite telecommunications. Additional non-commercial uses of spaceflight include space observatories, reconnaissance satellites and other Earth observation satellites.

A spaceflight typically begins with a rocket launch, which provides the initial thrust to overcome the force of gravity and propels the spacecraft from the surface of the Earth. Once in space, the motion of a spacecraft – both when unpropelled and when under propulsion – is covered by the area of study called astrodynamics. Some spacecraft remain in space indefinitely, some disintegrate during atmospheric reentry, and others reach a planetary or lunar surface for landing or impact.

History

Main articles: History of spaceflight and Timeline of spaceflight

Tsiolkovsky, early space theorist

The first theoretical proposal of space travel using rockets was published by Scottish astronomer and mathematician William Leitch, in an 1861 essay "A Journey Through Space".[1] More well-known (though not widely outside Russia) is Konstantin Tsiolkovsky's work, "Исследование мировых пространств реактивными приборами" (The Exploration of Cosmic Space by Means of Reaction Devices), published in 1903.

Spaceflight became an engineering possibility with the work of Robert H. Goddard's publication in 1919 of his paper A Method of Reaching Extreme Altitudes. His application of the de Laval nozzle to liquid fuel rockets improved efficiency enough for interplanetary travel to become possible. He also proved in the laboratory that rockets would work in the vacuum of space;[specify] nonetheless, his work was not taken seriously by the public. His attempt to secure an Army contract for a rocket-propelled weapon in the first World War was defeated by the November 11, 1918 armistice with Germany. Working with private financial support, he was the first to launch a liquid-fueled rocket in 1926. Goddard's paper was highly influential on Hermann Oberth, who in turn influenced Wernher von Braun. Von Braun became the first to produce modern rockets as guided weapons, employed by Adolf Hitler. Von Braun's V-2 was the first rocket to reach space, at an altitude of 189 kilometers (102 nautical miles) on a June 1944 test flight.[2]

Tsiolkovsky's rocketry work was not fully appreciated in his lifetime, but he influenced Sergey Korolev, who became the Soviet Union's chief rocket designer under Joseph Stalin, to develop intercontinental ballistic missiles to carry nuclear weapons as a counter measure to United States bomber planes. Derivatives of Korolev's R-7 Semyorka missiles were used to launch the world's first artificial Earth satellite, Sputnik 1, on October 4, 1957, and later the first human to orbit the Earth, Yuri Gagarin in Vostok 1, on April 12, 1961.[3]

At the end of World War II, von Braun and most of his rocket team surrendered to the United States, and were expatriated to work on American missiles at what became the Army Ballistic Missile Agency. This work on missiles such as Juno I and Atlas enabled launch of the first US satellite Explorer 1 on February 1, 1958, and the first American in orbit, John Glenn in Friendship 7 on February 20, 1962. As director of the Marshall Space Flight Center, Von Braun oversaw development of a larger class of rocket called Saturn, which allowed the US to send the first two humans, Neil Armstrong and Buzz Aldrin, to the Moon and back on Apollo 11 in July 1969. Over the same period, the Soviet Union secretly tried but failed to develop the N1 rocket to give them the capability to land one person on the Moon.

Phases

Launch

Main article: Rocket launch

See also: List of space launch system designs

Rockets are the only means currently capable of reaching orbit or beyond. Other non-rocket spacelaunch technologies have yet to be built, or remain short of orbital speeds. A rocket launch for a spaceflight usually starts from a spaceport (cosmodrome), which may be equipped with launch complexes and launch pads for vertical rocket launches, and runways for takeoff and landing of carrier airplanes and winged spacecraft. Spaceports are situated well away from human habitation for noise and safety reasons. ICBMs have various special launching facilities.

A launch is often restricted to certain launch windows. These windows depend upon the position of celestial bodies and orbits relative to the launch site. The biggest influence is often the rotation of the Earth itself. Once launched, orbits are normally located within relatively constant flat planes at a fixed angle to the axis of the Earth, and the Earth rotates within this orbit.

A launch pad is a fixed structure designed to dispatch airborne vehicles. It generally consists of a launch tower and flame trench. It is surrounded by equipment used to erect, fuel, and maintain launch vehicles. Before launch, the rocket can weigh many hundreds of tonnes. The Space Shuttle Columbia, on STS-1, weighed 2,030 tonnes (4,480,000 lb) at take off.

Reaching space

The most commonly used definition of outer space is everything beyond the Kármán line, which is 100 kilometers (62 mi) above the Earth's surface. The United States sometimes defines outer space as everything beyond 50 miles (80 km) in altitude.

Rockets are the only currently practical means of reaching space. Conventional airplane engines cannot reach space due to the lack of oxygen. Rocket engines expel propellant to provide forward thrust that generates enough delta-v (change in velocity) to reach orbit.

For manned launch systems launch escape systems are frequently fitted to allow astronauts to escape in the case of emergency.

Alternatives

Main article: Non-rocket spacelaunch

Many ways to reach space other than rockets have been proposed. Ideas such as the space elevator, and momentum exchange tethers like rotovators or skyhooks require new materials much stronger than any currently known. Electromagnetic launchers such as launch loops might be feasible with current technology. Other ideas include rocket assisted aircraft/spaceplanes such as Reaction Engines Skylon (currently in early stage development), scramjet powered spaceplanes, and RBCC powered spaceplanes. Gun launch has been proposed for cargo.

Leaving orbit

This section possibly contains original research. Relevant discussion may be found on Talk:Spaceflight. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. (June 2018) (Learn how and when to remove this template message)

Main articles: Escape velocity and Parking orbit

Launched in 1959, Luna 1 was the first known man-made object to achieve escape velocity from the Earth.[4] (replica pictured)

Achieving a closed orbit is not essential to lunar and interplanetary voyages. Early Russian space vehicles successfully achieved very high altitudes without going into orbit. NASA considered launching Apollo missions directly into lunar trajectories but adopted the strategy of first entering a temporary parking orbit and then performing a separate burn several orbits later onto a lunar trajectory. This costs additional propellant because the parking orbit perigee must be high enough to prevent reentry while direct injection can have an arbitrarily low perigee because it will never be reached.

However, the parking orbit approach greatly simplified Apollo mission planning in several important ways. It substantially widened the allowable launch windows, increasing the chance of a successful launch despite minor technical problems during the countdown. The parking orbit was a stable "mission plateau" that gave the crew and controllers several hours to thoroughly check out the spacecraft after the stresses of launch before committing it to a long lunar flight; the crew could quickly return to Earth, if necessary, or an alternate Earth-orbital mission could be conducted. The parking orbit also enabled translunar trajectories that avoided the densest parts of the Van Allen radiation belts.

Apollo missions minimized the performance penalty of the parking orbit by keeping its altitude as low as possible. For example, Apollo 15 used an unusually low parking orbit (even for Apollo) of 92.5 nmi by 91.5 nmi (171 km by 169 km) where there was significant atmospheric drag. But it was partially overcome by continuous venting of hydrogen from the third stage of the Saturn V, and was in any event tolerable for the short stay.

Robotic missions do not require an abort capability or radiation minimization, and because modern launchers routinely meet "instantaneous" launch windows, space probes to the Moon and other planets generally use direct injection to maximize performance. Although some might coast briefly during the launch sequence, they do not complete one or more full parking orbits before the burn that injects them onto an Earth escape trajectory.

Note that the escape velocity from a celestial body decreases with altitude above that body. However, it is more fuel-efficient for a craft to burn its fuel as close to the ground as possible; see Oberth effect and reference.[5] This is another way to explain the performance penalty associated with establishing the safe perigee of a parking orbit.

Plans for future crewed interplanetary spaceflight missions often include final vehicle assembly in Earth orbit, such as NASA's Project Orion and Russia's Kliper/Parom tandem.

Astrodynamics

Main article: Orbital mechanics

Astrodynamics is the study of spacecraft trajectories, particularly as they relate to gravitational and propulsion effects. Astrodynamics allows for a spacecraft to arrive at its destination at the correct time without excessive propellant use. An orbital maneuvering system may be needed to maintain or change orbits.

Non-rocket orbital propulsion methods include solar sails, magnetic sails, plasma-bubble magnetic systems, and using gravitational slingshot effects.

Ionized gas trail from Shuttle reentry

Recovery of Discoverer 14 return capsule by a C-119 airplane

Transfer energy

The term "transfer energy" means the total amount of energy imparted by a rocket stage to its payload. This can be the energy imparted by a first stage of a launch vehicle to an upper stage plus payload, or by an upper stage or spacecraft kick motor to a spacecraft.[6][7]

Reentry

Main article: Atmospheric reentry

Vehicles in orbit have large amounts of kinetic energy. This energy must be discarded if the vehicle is to land safely without vaporizing in the atmosphere. Typically this process requires special methods to protect against aerodynamic heating. The theory behind reentry was developed by Harry Julian Allen. Based on this theory, reentry vehicles present blunt shapes to the atmosphere for reentry. Blunt shapes mean that less than 1% of the kinetic energy ends up as heat that reaches the vehicle, and the remainder heats up the atmosphere.

Landing

The Mercury, Gemini, and Apollo capsules all splashed down in the sea. These capsules were designed to land at relatively low speeds with the help of a parachute. Russian capsules for Soyuz make use of a big parachute and braking rockets to touch down on land. The Space Shuttle glided to a touchdown like a plane.

Recovery

After a successful landing the spacecraft, its occupants and cargo can be recovered. In some cases, recovery has occurred before landing: while a spacecraft is still descending on its parachute, it can be snagged by a specially designed aircraft. This mid-air retrieval technique was used to recover the film canisters from the Corona spy satellites.

Types

Uncrewed

See also: Uncrewed spacecraft and robotic spacecraft

Sojourner takes its Alpha particle X-ray spectrometer measurement of Yogi Rock on Mars

The MESSENGER spacecraft at Mercury (artist's interpretation)

Uncrewed spaceflight (or unmanned) is all spaceflight activity without a necessary human presence in space. This includes all space probes, satellites and robotic spacecraft and missions. Uncrewed spaceflight is the opposite of manned spaceflight, which is usually called human spaceflight. Subcategories of uncrewed spaceflight are "robotic spacecraft" (objects) and "robotic space missions" (activities). A robotic spacecraft is an uncrewed spacecraft with no humans on board, that is usually under telerobotic control. A robotic spacecraft designed to make scientific research measurements is often called a space probe.

Uncrewed space missions use remote-controlled spacecraft. The first uncrewed space mission was Sputnik I, launched October 4, 1957 to orbit the Earth. Space missions where other animals but no humans are on-board are considered uncrewed missions.

Benefits

Many space missions are more suited to telerobotic rather than crewed operation, due to lower cost and lower risk factors. In addition, some planetary destinations such as Venus or the vicinity of Jupiter are too hostile for human survival, given current technology. Outer planets such as Saturn, Uranus, and Neptune are too distant to reach with current crewed spaceflight technology, so telerobotic probes are the only way to explore them. Telerobotics also allows exploration of regions that are vulnerable to contamination by Earth micro-organisms since spacecraft can be sterilized. Humans can not be sterilized in the same way as a spaceship, as they coexist with numerous micro-organisms, and these micro-organisms are also hard to contain within a spaceship or spacesuit.

Telepresence

Telerobotics becomes telepresence when the time delay is short enough to permit control of the spacecraft in close to real time by humans. Even the two seconds light speed delay for the Moon is too far away for telepresence exploration from Earth. The L1 and L2 positions permit 400-millisecond round trip delays, which is just close enough for telepresence operation. Telepresence has also been suggested as a way to repair satellites in Earth orbit from Earth. The Exploration Telerobotics Symposium in 2012 explored this and other topics.[8]

Human

Main article: Human spaceflight

ISS crew member stores samples

The first human spaceflight was Vostok 1 on April 12, 1961, on which cosmonaut Yuri Gagarin of the USSR made one orbit around the Earth. In official Soviet documents, there is no mention of the fact that Gagarin parachuted the final seven miles.[9] Currently, the only spacecraft regularly used for human spaceflight are the Russian Soyuz spacecraft and the Chinese Shenzhou spacecraft. The U.S. Space Shuttle fleet operated from April 1981 until July 2011. SpaceShipOne has conducted two human suborbital spaceflights.

Sub-orbital

Main article: Sub-orbital spaceflight

The International Space Station in Earth orbit after a visit from the crew of STS-119

On a sub-orbital spaceflight the spacecraft reaches space and then returns to the atmosphere after following a (primarily) ballistic trajectory. This is usually because of insufficient specific orbital energy, in which case a suborbital flight will last only a few minutes, but it is also possible for an object with enough energy for an orbit to have a trajectory that intersects the Earth's atmosphere, sometimes after many hours. Pioneer 1 was NASA's first space probe intended to reach the Moon. A partial failure caused it to instead follow a suborbital trajectory to an altitude of 113,854 kilometers (70,746 mi) before reentering the Earth's atmosphere 43 hours after launch.

The most generally recognized boundary of space is the Kármán line 100 km above sea level. (NASA alternatively defines an astronaut as someone who has flown more than 50 miles (80 km) above sea level.) It is not generally recognized by the public that the increase in potential energy required to pass the Kármán line is only about 3% of the orbital energy (potential plus kinetic energy) required by the lowest possible Earth orbit (a circular orbit just above the Kármán line.) In other words, it is far easier to reach space than to stay there. On May 17, 2004, Civilian Space eXploration Team launched the GoFast Rocket on a suborbital flight, the first amateur spaceflight. On June 21, 2004, SpaceShipOne was used for the first privately funded human spaceflight.

Point-to-point

Point-to-point is a category of sub-orbital spaceflight in which a spacecraft provides rapid transport between two terrestrial locations. Consider a conventional airline route between London and Sydney, a flight that normally lasts over twenty hours. With point-to-point suborbital travel the same route could be traversed in less than one hour.[10] While no company offers this type of transportation today, SpaceX has revealed plans to do so as early as the 2020s using its BFR vehicle.[11] Suborbital spaceflight over an intercontinental distance requires a vehicle velocity that is only a little lower than the velocity required to reach low Earth orbit.[12] If rockets are used, the size of the rocket relative to the payload is similar to an Intercontinental Ballistic Missile (ICBM). Any intercontinental spaceflight has to surmount problems of heating during atmosphere re-entry that are nearly as large as those faced by orbital spaceflight.

Orbital

Main article: Orbital spaceflight

Apollo 6 heads into orbit

A minimal orbital spaceflight requires much higher velocities than a minimal sub-orbital flight, and so it is technologically much more challenging to achieve. To achieve orbital spaceflight, the tangential velocity around the Earth is as important as altitude. In order to perform a stable and lasting flight in space, the spacecraft must reach the minimal orbital speed required for a closed orbit.

Interplanetary

Main article: Interplanetary spaceflight

Interplanetary travel is travel between planets within a single planetary system. In practice, the use of the term is confined to travel between the planets of our Solar System.

Interstellar

Main article: Interstellar travel

Five spacecraft are currently leaving the Solar System on escape trajectories, Voyager 1, Voyager 2, Pioneer 10, Pioneer 11, and New Horizons. The one farthest from the Sun is Voyager 1, which is more than 100 AU distant and is moving at 3.6 AU per year.[13] In comparison, Proxima Centauri, the closest star other than the Sun, is 267,000 AU distant. It will take Voyager 1 over 74,000 years to reach this distance. Vehicle designs using other techniques, such as nuclear pulse propulsion are likely to be able to reach the nearest star significantly faster. Another possibility that could allow for human interstellar spaceflight is to make use of time dilation, as this would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. However, attaining such high speeds would still require the use of some new, advanced method of propulsion.

Intergalactic

Main article: Intergalactic travel

Intergalactic travel involves spaceflight between galaxies, and is considered much more technologically demanding than even interstellar travel and, by current engineering terms, is considered science fiction.

Spacecraft

Main article: Spacecraft

An Apollo Lunar Module on the lunar surface

Spacecraft are vehicles capable of controlling their trajectory through space.

The first 'true spacecraft' is sometimes said to be Apollo Lunar Module,[14] since this was the only manned vehicle to have been designed for, and operated only in space; and is notable for its non aerodynamic shape.

Propulsion

Main article: Spacecraft propulsion

Spacecraft today predominantly use rockets for propulsion, but other propulsion techniques such as ion drives are becoming more common, particularly for unmanned vehicles, and this can significantly reduce the vehicle's mass and increase its delta-v.

Launch systems

Main article: Launch vehicle

Launch systems are used to carry a payload from Earth's surface into outer space.

Expendable

Main article: Expendable launch system

Most current spaceflight uses multi-stage expendable launch systems to reach space.

Reusable

Main article: Reusable launch system

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This section needs to be updated. Please update this article to reflect recent events or newly available information. (August 2019)

The first reusable spacecraft, the X-15, was air-launched on a suborbital trajectory on July 19, 1963. The first partially reusable orbital spacecraft, the Space Shuttle, was launched by the USA on the 20th anniversary of Yuri Gagarin's flight, on April 12, 1981. During the Shuttle era, six orbiters were built, all of which have flown in the atmosphere and five of which have flown in space. The Enterprise was used only for approach and landing tests, launching from the back of a Boeing 747 and gliding to deadstick landings at Edwards AFB, California. The first Space Shuttle to fly into space was the Columbia, followed by the Challenger, Discovery, Atlantis, and Endeavour. The Endeavour was built to replace the Challenger, which was lost in January 1986. The Columbia broke up during reentry in February 2003.

The Space Shuttle Columbia seconds after engine ignition on mission STS-1

Columbia landing, concluding the STS-1 mission

Columbia launches again on STS-2

The first automatic partially reusable spacecraft was the Buran (Snowstorm), launched by the USSR on November 15, 1988, although it made only one flight. This spaceplane was designed for a crew and strongly resembled the US Space Shuttle, although its drop-off boosters used liquid propellants and its main engines were located at the base of what would be the external tank in the American Shuttle. Lack of funding, complicated by the dissolution of the USSR, prevented any further flights of Buran.

Per the Vision for Space Exploration, the Space Shuttle was retired in 2011 due mainly to its old age and high cost of the program reaching over a billion dollars per flight. The Shuttle's human transport role is to be replaced by the partially reusable Crew Exploration Vehicle (CEV) no later than 2021. The Shuttle's heavy cargo transport role is to be replaced by expendable rockets such as the Evolved Expendable Launch Vehicle (EELV) or a Shuttle Derived Launch Vehicle.

Scaled Composites SpaceShipOne was a reusable suborbital spaceplane that carried pilots Mike Melvill and Brian Binnie on consecutive flights in 2004 to win the Ansari X Prize. The Spaceship Company has built its successor SpaceShipTwo. A fleet of SpaceShipTwos operated by Virgin Galactic planned to begin reusable private spaceflight carrying paying passengers (space tourists) in 2008, but this was delayed due to an accident in the propulsion development.[15]

Challenges

Main article: Effect of spaceflight on the human body

Space disasters

Main article: Space accidents and incidents

All launch vehicles contain a huge amount of energy that is needed for some part of it to reach orbit. There is therefore some risk that this energy can be released prematurely and suddenly, with significant effects. When a Delta II rocket exploded 13 seconds after launch on January 17, 1997, there were reports of store windows 10 miles (16 km) away being broken by the blast.[16]

Space is a fairly predictable environment, but there are still risks of accidental depressurization and the potential failure of equipment, some of which may be very newly developed.

In 2004 the International Association for the Advancement of Space Safety was established in the Netherlands to further international cooperation and scientific advancement in space systems safety.[17]

Weightlessness

Main article: Weightlessness

Astronauts on the ISS in weightless conditions. Michael Foale can be seen exercising in the foreground.

In a microgravity environment such as that provided by a spacecraft in orbit around the Earth, humans experience a sense of "weightlessness." Short-term exposure to microgravity causes space adaptation syndrome, a self-limiting nausea caused by derangement of the vestibular system. Long-term exposure causes multiple health issues. The most significant is bone loss, some of which is permanent, but microgravity also leads to significant deconditioning of muscular and cardiovascular tissues.

Radiation

Once above the atmosphere, radiation due to the Van Allen belts, solar radiation and cosmic radiation issues occur and increase. Further away from the Earth, solar flares can give a fatal radiation dose in minutes, and the health threat from cosmic radiation significantly increases the chances of cancer over a decade exposure or more.[18]

Life support

Main article: Life support system

In human spaceflight, the life support system is a group of devices that allow a human being to survive in outer space. NASA often uses the phrase Environmental Control and Life Support System or the acronym ECLSS when describing these systems for its human spaceflight missions.[19] The life support system may supply: air, water and food. It must also maintain the correct body temperature, an acceptable pressure on the body and deal with the body's waste products. Shielding against harmful external influences such as radiation and micro-meteorites may also be necessary. Components of the life support system are life-critical, and are designed and constructed using safety engineering techniques.

Space weather

Main article: Space weather

Aurora australis and Discovery, May 1991.

Space weather is the concept of changing environmental conditions in outer space. It is distinct from the concept of weather within a planetary atmosphere, and deals with phenomena involving ambient plasma, magnetic fields, radiation and other matter in space (generally close to Earth but also in interplanetary, and occasionally interstellar medium). "Space weather describes the conditions in space that affect Earth and its technological systems. Our space weather is a consequence of the behavior of the Sun, the nature of Earth's magnetic field, and our location in the Solar System."[20]

Space weather exerts a profound influence in several areas related to space exploration and development. Changing geomagnetic conditions can induce changes in atmospheric density causing the rapid degradation of spacecraft altitude in Low Earth orbit. Geomagnetic storms due to increased solar activity can potentially blind sensors aboard spacecraft, or interfere with on-board electronics. An understanding of space environmental conditions is also important in designing shielding and life support systems for manned spacecraft.

Environmental considerations

Rockets as a class are not inherently grossly polluting. However, some rockets use toxic propellants, and most vehicles use propellants that are not carbon neutral. Many solid rockets have chlorine in the form of perchlorate or other chemicals, and this can cause temporary local holes in the ozone layer. Re-entering spacecraft generate nitrates which also can temporarily impact the ozone layer. Most rockets are made of metals that can have an environmental impact during their construction.

In addition to the atmospheric effects there are effects on the near-Earth space environment. There is the possibility that orbit could become inaccessible for generations due to exponentially increasing space debris caused by spalling of satellites and vehicles (Kessler syndrome). Many launched vehicles today are therefore designed to be re-entered after use.

IR HDR with Polarizing filter by David

3 1

Experiment with converted IR camera using a polarizing filter and HDR software. AEB +/-2 total 3 exposures processed with Photomatix.

High Dynamic Range (HDR)

High-dynamic-range imaging (HDRI) is a high dynamic range (HDR) technique used in imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard digital imaging or photographic techniques. The aim is to present a similar range of luminance to that experienced through the human visual system. The human eye, through adaptation of the iris and other methods, adjusts constantly to adapt to a broad range of luminance present in the environment. The brain continuously interprets this information so that a viewer can see in a wide range of light conditions.

HDR images can represent a greater range of luminance levels than can be achieved using more 'traditional' methods, such as many real-world scenes containing very bright, direct sunlight to extreme shade, or very faint nebulae. This is often achieved by capturing and then combining several different, narrower range, exposures of the same subject matter. Non-HDR cameras take photographs with a limited exposure range, referred to as LDR, resulting in the loss of detail in highlights or shadows.

The two primary types of HDR images are computer renderings and images resulting from merging multiple low-dynamic-range (LDR) or standard-dynamic-range (SDR) photographs. HDR images can also be acquired using special image sensors, such as an oversampled binary image sensor.

Due to the limitations of printing and display contrast, the extended luminosity range of an HDR image has to be compressed to be made visible. The method of rendering an HDR image to a standard monitor or printing device is called tone mapping. This method reduces the overall contrast of an HDR image to facilitate display on devices or printouts with lower dynamic range, and can be applied to produce images with preserved local contrast (or exaggerated for artistic effect).

In photography, dynamic range is measured in exposure value (EV) differences (known as stops). An increase of one EV, or 'one stop', represents a doubling of the amount of light. Conversely, a decrease of one EV represents a halving of the amount of light. Therefore, revealing detail in the darkest of shadows requires high exposures, while preserving detail in very bright situations requires very low exposures. Most cameras cannot provide this range of exposure values within a single exposure, due to their low dynamic range. High-dynamic-range photographs are generally achieved by capturing multiple standard-exposure images, often using exposure bracketing, and then later merging them into a single HDR image, usually within a photo manipulation program). Digital images are often encoded in a camera's raw image format, because 8-bit JPEG encoding does not offer a wide enough range of values to allow fine transitions (and regarding HDR, later introduces undesirable effects due to lossy compression).

Any camera that allows manual exposure control can make images for HDR work, although one equipped with auto exposure bracketing (AEB) is far better suited. Images from film cameras are less suitable as they often must first be digitized, so that they can later be processed using software HDR methods.

In most imaging devices, the degree of exposure to light applied to the active element (be it film or CCD) can be altered in one of two ways: by either increasing/decreasing the size of the aperture or by increasing/decreasing the time of each exposure. Exposure variation in an HDR set is only done by altering the exposure time and not the aperture size; this is because altering the aperture size also affects the depth of field and so the resultant multiple images would be quite different, preventing their final combination into a single HDR image.

An important limitation for HDR photography is that any movement between successive images will impede or prevent success in combining them afterwards. Also, as one must create several images (often three or five and sometimes more) to obtain the desired luminance range, such a full 'set' of images takes extra time. HDR photographers have developed calculation methods and techniques to partially overcome these problems, but the use of a sturdy tripod is, at least, advised.

Some cameras have an auto exposure bracketing (AEB) feature with a far greater dynamic range than others, from the 3 EV of the Canon EOS 40D, to the 18 EV of the Canon EOS-1D Mark II. As the popularity of this imaging method grows, several camera manufactures are now offering built-in HDR features. For example, the Pentax K-7 DSLR has an HDR mode that captures an HDR image and outputs (only) a tone mapped JPEG file. The Canon PowerShot G12, Canon PowerShot S95 and Canon PowerShot S100 offer similar features in a smaller format.. Nikon's approach is called 'Active D-Lighting' which applies exposure compensation and tone mapping to the image as it comes from the sensor, with the accent being on retaing a realistic effect . Some smartphones provide HDR modes, and most mobile platforms have apps that provide HDR picture taking.

Camera characteristics such as gamma curves, sensor resolution, noise, photometric calibration and color calibration affect resulting high-dynamic-range images.

Color film negatives and slides consist of multiple film layers that respond to light differently. As a consequence, transparent originals (especially positive slides) feature a very high dynamic range

Tone mapping

Tone mapping reduces the dynamic range, or contrast ratio, of an entire image while retaining localized contrast. Although it is a distinct operation, tone mapping is often applied to HDRI files by the same software package.

Several software applications are available on the PC, Mac and Linux platforms for producing HDR files and tone mapped images. Notable titles include

Adobe Photoshop

Aurora HDR

Dynamic Photo HDR

HDR Efex Pro

HDR PhotoStudio

Luminance HDR

MagicRaw

Oloneo PhotoEngine

Photomatix Pro

PTGui

Information stored in high-dynamic-range images typically corresponds to the physical values of luminance or radiance that can be observed in the real world. This is different from traditional digital images, which represent colors as they should appear on a monitor or a paper print. Therefore, HDR image formats are often called scene-referred, in contrast to traditional digital images, which are device-referred or output-referred. Furthermore, traditional images are usually encoded for the human visual system (maximizing the visual information stored in the fixed number of bits), which is usually called gamma encoding or gamma correction. The values stored for HDR images are often gamma compressed (power law) or logarithmically encoded, or floating-point linear values, since fixed-point linear encodings are increasingly inefficient over higher dynamic ranges.

HDR images often don't use fixed ranges per color channel—other than traditional images—to represent many more colors over a much wider dynamic range. For that purpose, they don't use integer values to represent the single color channels (e.g., 0-255 in an 8 bit per pixel interval for red, green and blue) but instead use a floating point representation. Common are 16-bit (half precision) or 32-bit floating point numbers to represent HDR pixels. However, when the appropriate transfer function is used, HDR pixels for some applications can be represented with a color depth that has as few as 10–12 bits for luminance and 8 bits for chrominance without introducing any visible quantization artifacts.

History of HDR photography

The idea of using several exposures to adequately reproduce a too-extreme range of luminance was pioneered as early as the 1850s by Gustave Le Gray to render seascapes showing both the sky and the sea. Such rendering was impossible at the time using standard methods, as the luminosity range was too extreme. Le Gray used one negative for the sky, and another one with a longer exposure for the sea, and combined the two into one picture in positive.

Mid 20th century

Manual tone mapping was accomplished by dodging and burning – selectively increasing or decreasing the exposure of regions of the photograph to yield better tonality reproduction. This was effective because the dynamic range of the negative is significantly higher than would be available on the finished positive paper print when that is exposed via the negative in a uniform manner. An excellent example is the photograph Schweitzer at the Lamp by W. Eugene Smith, from his 1954 photo essay A Man of Mercy on Dr. Albert Schweitzer and his humanitarian work in French Equatorial Africa. The image took 5 days to reproduce the tonal range of the scene, which ranges from a bright lamp (relative to the scene) to a dark shadow.

Ansel Adams elevated dodging and burning to an art form. Many of his famous prints were manipulated in the darkroom with these two methods. Adams wrote a comprehensive book on producing prints called The Print, which prominently features dodging and burning, in the context of his Zone System.

With the advent of color photography, tone mapping in the darkroom was no longer possible due to the specific timing needed during the developing process of color film. Photographers looked to film manufacturers to design new film stocks with improved response, or continued to shoot in black and white to use tone mapping methods.

Color film capable of directly recording high-dynamic-range images was developed by Charles Wyckoff and EG&G "in the course of a contract with the Department of the Air Force". This XR film had three emulsion layers, an upper layer having an ASA speed rating of 400, a middle layer with an intermediate rating, and a lower layer with an ASA rating of 0.004. The film was processed in a manner similar to color films, and each layer produced a different color. The dynamic range of this extended range film has been estimated as 1:108. It has been used to photograph nuclear explosions, for astronomical photography, for spectrographic research, and for medical imaging. Wyckoff's detailed pictures of nuclear explosions appeared on the cover of Life magazine in the mid-1950s.

Late 20th century

Georges Cornuéjols and licensees of his patents (Brdi, Hymatom) introduced the principle of HDR video image, in 1986, by interposing a matricial LCD screen in front of the camera's image sensor, increasing the sensors dynamic by five stops. The concept of neighborhood tone mapping was applied to video cameras by a group from the Technion in Israel led by Dr. Oliver Hilsenrath and Prof. Y.Y.Zeevi who filed for a patent on this concept in 1988.

In February and April 1990, Georges Cornuéjols introduced the first real-time HDR camera that combined two images captured by a sensor3435 or simultaneously3637 by two sensors of the camera. This process is known as bracketing used for a video stream.

In 1991, the first commercial video camera was introduced that performed real-time capturing of multiple images with different exposures, and producing an HDR video image, by Hymatom, licensee of Georges Cornuéjols.

Also in 1991, Georges Cornuéjols introduced the HDR+ image principle by non-linear accumulation of images to increase the sensitivity of the camera: for low-light environments, several successive images are accumulated, thus increasing the signal to noise ratio.

In 1993, another commercial medical camera producing an HDR video image, by the Technion.

Modern HDR imaging uses a completely different approach, based on making a high-dynamic-range luminance or light map using only global image operations (across the entire image), and then tone mapping the result. Global HDR was first introduced in 19931 resulting in a mathematical theory of differently exposed pictures of the same subject matter that was published in 1995 by Steve Mann and Rosalind Picard.

On October 28, 1998, Ben Sarao created one of the first nighttime HDR+G (High Dynamic Range + Graphic image)of STS-95 on the launch pad at NASA's Kennedy Space Center. It consisted of four film images of the shuttle at night that were digitally composited with additional digital graphic elements. The image was first exhibited at NASA Headquarters Great Hall, Washington DC in 1999 and then published in Hasselblad Forum, Issue 3 1993, Volume 35 ISSN 0282-5449.

The advent of consumer digital cameras produced a new demand for HDR imaging to improve the light response of digital camera sensors, which had a much smaller dynamic range than film. Steve Mann developed and patented the global-HDR method for producing digital images having extended dynamic range at the MIT Media Laboratory. Mann's method involved a two-step procedure: (1) generate one floating point image array by global-only image operations (operations that affect all pixels identically, without regard to their local neighborhoods); and then (2) convert this image array, using local neighborhood processing (tone-remapping, etc.), into an HDR image. The image array generated by the first step of Mann's process is called a lightspace image, lightspace picture, or radiance map. Another benefit of global-HDR imaging is that it provides access to the intermediate light or radiance map, which has been used for computer vision, and other image processing operations.

21st century

In 2005, Adobe Systems introduced several new features in Photoshop CS2 including Merge to HDR, 32 bit floating point image support, and HDR tone mapping.

On June 30, 2016, Microsoft added support for the digital compositing of HDR images to Windows 10 using the Universal Windows Platform.

HDR sensors

Modern CMOS image sensors can often capture a high dynamic range from a single exposure. The wide dynamic range of the captured image is non-linearly compressed into a smaller dynamic range electronic representation. However, with proper processing, the information from a single exposure can be used to create an HDR image.

Such HDR imaging is used in extreme dynamic range applications like welding or automotive work. Some other cameras designed for use in security applications can automatically provide two or more images for each frame, with changing exposure. For example, a sensor for 30fps video will give out 60fps with the odd frames at a short exposure time and the even frames at a longer exposure time. Some of the sensor may even combine the two images on-chip so that a wider dynamic range without in-pixel compression is directly available to the user for display or processing.

en.wikipedia.org/wiki/High-dynamic-range_imaging

Infrared Photography

In infrared photography, the film or image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for photography range from about 700 nm to about 900 nm. Film is usually sensitive to visible light too, so an infrared-passing filter is used; this lets infrared (IR) light pass through to the camera, but blocks all or most of the visible light spectrum (the filter thus looks black or deep red). ("Infrared filter" may refer either to this type of filter or to one that blocks infrared but passes other wavelengths.)

When these filters are used together with infrared-sensitive film or sensors, "in-camera effects" can be obtained; false-color or black-and-white images with a dreamlike or sometimes lurid appearance known as the "Wood Effect," an effect mainly caused by foliage (such as tree leaves and grass) strongly reflecting in the same way visible light is reflected from snow. There is a small contribution from chlorophyll fluorescence, but this is marginal and is not the real cause of the brightness seen in infrared photographs. The effect is named after the infrared photography pioneer Robert W. Wood, and not after the material wood, which does not strongly reflect infrared.

The other attributes of infrared photographs include very dark skies and penetration of atmospheric haze, caused by reduced Rayleigh scattering and Mie scattering, respectively, compared to visible light. The dark skies, in turn, result in less infrared light in shadows and dark reflections of those skies from water, and clouds will stand out strongly. These wavelengths also penetrate a few millimeters into skin and give a milky look to portraits, although eyes often look black.

Until the early 20th century, infrared photography was not possible because silver halide emulsions are not sensitive to longer wavelengths than that of blue light (and to a lesser extent, green light) without the addition of a dye to act as a color sensitizer. The first infrared photographs (as distinct from spectrographs) to be published appeared in the February 1910 edition of The Century Magazine and in the October 1910 edition of the Royal Photographic Society Journal to illustrate papers by Robert W. Wood, who discovered the unusual effects that now bear his name. The RPS co-ordinated events to celebrate the centenary of this event in 2010. Wood's photographs were taken on experimental film that required very long exposures; thus, most of his work focused on landscapes. A further set of infrared landscapes taken by Wood in Italy in 1911 used plates provided for him by CEK Mees at Wratten & Wainwright. Mees also took a few infrared photographs in Portugal in 1910, which are now in the Kodak archives.

Infrared-sensitive photographic plates were developed in the United States during World War I for spectroscopic analysis, and infrared sensitizing dyes were investigated for improved haze penetration in aerial photography. After 1930, new emulsions from Kodak and other manufacturers became useful to infrared astronomy.

Infrared photography became popular with photography enthusiasts in the 1930s when suitable film was introduced commercially. The Times regularly published landscape and aerial photographs taken by their staff photographers using Ilford infrared film. By 1937 33 kinds of infrared film were available from five manufacturers including Agfa, Kodak and Ilford. Infrared movie film was also available and was used to create day-for-night effects in motion pictures, a notable example being the pseudo-night aerial sequences in the James Cagney/Bette Davis movie The Bride Came COD.

False-color infrared photography became widely practiced with the introduction of Kodak Ektachrome Infrared Aero Film and Ektachrome Infrared EIR. The first version of this, known as Kodacolor Aero-Reversal-Film, was developed by Clark and others at the Kodak for camouflage detection in the 1940s. The film became more widely available in 35mm form in the 1960s but KODAK AEROCHROME III Infrared Film 1443 has been discontinued.

Infrared photography became popular with a number of 1960s recording artists, because of the unusual results; Jimi Hendrix, Donovan, Frank and a slow shutter speed without focus compensation, however wider apertures like f/2.0 can produce sharp photos only if the lens is meticulously refocused to the infrared index mark, and only if this index mark is the correct one for the filter and film in use. However, it should be noted that diffraction effects inside a camera are greater at infrared wavelengths so that stopping down the lens too far may actually reduce sharpness.

Most apochromatic ('APO') lenses do not have an Infrared index mark and do not need to be refocused for the infrared spectrum because they are already optically corrected into the near-infrared spectrum. Catadioptric lenses do not often require this adjustment because their mirror containing elements do not suffer from chromatic aberration and so the overall aberration is comparably less. Catadioptric lenses do, of course, still contain lenses, and these lenses do still have a dispersive property.

Infrared black-and-white films require special development times but development is usually achieved with standard black-and-white film developers and chemicals (like D-76). Kodak HIE film has a polyester film base that is very stable but extremely easy to scratch, therefore special care must be used in the handling of Kodak HIE throughout the development and printing/scanning process to avoid damage to the film. The Kodak HIE film was sensitive to 900 nm.

As of November 2, 2007, "KODAK is preannouncing the discontinuance" of HIE Infrared 35 mm film stating the reasons that, "Demand for these products has been declining significantly in recent years, and it is no longer practical to continue to manufacture given the low volume, the age of the product formulations and the complexity of the processes involved." At the time of this notice, HIE Infrared 135-36 was available at a street price of around $12.00 a roll at US mail order outlets.

Arguably the greatest obstacle to infrared film photography has been the increasing difficulty of obtaining infrared-sensitive film. However, despite the discontinuance of HIE, other newer infrared sensitive emulsions from EFKE, ROLLEI, and ILFORD are still available, but these formulations have differing sensitivity and specifications from the venerable KODAK HIE that has been around for at least two decades. Some of these infrared films are available in 120 and larger formats as well as 35 mm, which adds flexibility to their application. With the discontinuance of Kodak HIE, Efke's IR820 film has become the only IR film on the marketneeds update with good sensitivity beyond 750 nm, the Rollei film does extend beyond 750 nm but IR sensitivity falls off very rapidly.

Color infrared transparency films have three sensitized layers that, because of the way the dyes are coupled to these layers, reproduce infrared as red, red as green, and green as blue. All three layers are sensitive to blue so the film must be used with a yellow filter, since this will block blue light but allow the remaining colors to reach the film. The health of foliage can be determined from the relative strengths of green and infrared light reflected; this shows in color infrared as a shift from red (healthy) towards magenta (unhealthy). Early color infrared films were developed in the older E-4 process, but Kodak later manufactured a color transparency film that could be developed in standard E-6 chemistry, although more accurate results were obtained by developing using the AR-5 process. In general, color infrared does not need to be refocused to the infrared index mark on the lens.

In 2007 Kodak announced that production of the 35 mm version of their color infrared film (Ektachrome Professional Infrared/EIR) would cease as there was insufficient demand. Since 2011, all formats of color infrared film have been discontinued. Specifically, Aerochrome 1443 and SO-734.

There is no currently available digital camera that will produce the same results as Kodak color infrared film although the equivalent images can be produced by taking two exposures, one infrared and the other full-color, and combining in post-production. The color images produced by digital still cameras using infrared-pass filters are not equivalent to those produced on color infrared film. The colors result from varying amounts of infrared passing through the color filters on the photo sites, further amended by the Bayer filtering. While this makes such images unsuitable for the kind of applications for which the film was used, such as remote sensing of plant health, the resulting color tonality has proved popular artistically.

Color digital infrared, as part of full spectrum photography is gaining popularity. The ease of creating a softly colored photo with infrared characteristics has found interest among hobbyists and professionals.

In 2008, Los Angeles photographer, Dean Bennici started cutting and hand rolling Aerochrome color Infrared film. All Aerochrome medium and large format which exists today came directly from his lab. The trend in infrared photography continues to gain momentum with the success of photographer Richard Mosse and multiple users all around the world.

Digital camera sensors are inherently sensitive to infrared light, which would interfere with the normal photography by confusing the autofocus calculations or softening the image (because infrared light is focused differently from visible light), or oversaturating the red channel. Also, some clothing is transparent in the infrared, leading to unintended (at least to the manufacturer) uses of video cameras. Thus, to improve image quality and protect privacy, many digital cameras employ infrared blockers. Depending on the subject matter, infrared photography may not be practical with these cameras because the exposure times become overly long, often in the range of 30 seconds, creating noise and motion blur in the final image. However, for some subject matter the long exposure does not matter or the motion blur effects actually add to the image. Some lenses will also show a 'hot spot' in the centre of the image as their coatings are optimised for visible light and not for IR.

An alternative method of DSLR infrared photography is to remove the infrared blocker in front of the sensor and replace it with a filter that removes visible light. This filter is behind the mirror, so the camera can be used normally - handheld, normal shutter speeds, normal composition through the viewfinder, and focus, all work like a normal camera. Metering works but is not always accurate because of the difference between visible and infrared refraction. When the IR blocker is removed, many lenses which did display a hotspot cease to do so, and become perfectly usable for infrared photography. Additionally, because the red, green and blue micro-filters remain and have transmissions not only in their respective color but also in the infrared, enhanced infrared color may be recorded.

Since the Bayer filters in most digital cameras absorb a significant fraction of the infrared light, these cameras are sometimes not very sensitive as infrared cameras and can sometimes produce false colors in the images. An alternative approach is to use a Foveon X3 sensor, which does not have absorptive filters on it; the Sigma SD10 DSLR has a removable IR blocking filter and dust protector, which can be simply omitted or replaced by a deep red or complete visible light blocking filter. The Sigma SD14 has an IR/UV blocking filter that can be removed/installed without tools. The result is a very sensitive digital IR camera.

While it is common to use a filter that blocks almost all visible light, the wavelength sensitivity of a digital camera without internal infrared blocking is such that a variety of artistic results can be obtained with more conventional filtration. For example, a very dark neutral density filter can be used (such as the Hoya ND400) which passes a very small amount of visible light compared to the near-infrared it allows through. Wider filtration permits an SLR viewfinder to be used and also passes more varied color information to the sensor without necessarily reducing the Wood effect. Wider filtration is however likely to reduce other infrared artefacts such as haze penetration and darkened skies. This technique mirrors the methods used by infrared film photographers where black-and-white infrared film was often used with a deep red filter rather than a visually opaque one.

Another common technique with near-infrared filters is to swap blue and red channels in software (e.g. photoshop) which retains much of the characteristic 'white foliage' while rendering skies a glorious blue.

Several Sony cameras had the so-called Night Shot facility, which physically moves the blocking filter away from the light path, which makes the cameras very sensitive to infrared light. Soon after its development, this facility was 'restricted' by Sony to make it difficult for people to take photos that saw through clothing. To do this the iris is opened fully and exposure duration is limited to long times of more than 1/30 second or so. It is possible to shoot infrared but neutral density filters must be used to reduce the camera's sensitivity and the long exposure times mean that care must be taken to avoid camera-shake artifacts.

Fuji have produced digital cameras for use in forensic criminology and medicine which have no infrared blocking filter. The first camera, designated the S3 PRO UVIR, also had extended ultraviolet sensitivity (digital sensors are usually less sensitive to UV than to IR). Optimum UV sensitivity requires special lenses, but ordinary lenses usually work well for IR. In 2007, FujiFilm introduced a new version of this camera, based on the Nikon D200/ FujiFilm S5 called the IS Pro, also able to take Nikon lenses. Fuji had earlier introduced a non-SLR infrared camera, the IS-1, a modified version of the FujiFilm FinePix S9100. Unlike the S3 PRO UVIR, the IS-1 does not offer UV sensitivity. FujiFilm restricts the sale of these cameras to professional users with their EULA specifically prohibiting "unethical photographic conduct".

Phase One digital camera backs can be ordered in an infrared modified form.

Remote sensing and thermographic cameras are sensitive to longer wavelengths of infrared (see Infrared spectrum#Commonly used sub-division scheme). They may be multispectral and use a variety of technologies which may not resemble common camera or filter designs. Cameras sensitive to longer infrared wavelengths including those used in infrared astronomy often require cooling to reduce thermally induced dark currents in the sensor (see Dark current (physics)). Lower cost uncooled thermographic digital cameras operate in the Long Wave infrared band (see Thermographic camera#Uncooled infrared detectors). These cameras are generally used for building inspection or preventative maintenance but can be used for artistic pursuits as well.

en.wikipedia.org/wiki/Infrared_photography

Medievil Torture Device? by Martin Cathrae

4

Apparently it has something to do with brains... so I guess it's actually worse than you might think... :)

Device testing dConstruct by Jeremy Keith

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Woodcut printer's device of Andreas Wechel by POP

3 1

Woodcut device of Paris (and, later, Frankfurt) printer Andreas Wechel depicting Pegasus being supported by cornucopias held by clasped hands emerging from clouds, with a cadeceus in center of device.

Established heading: Wechel, Andreas,‏ ‎‡d d. 1581‏

Penn Libraries call number: LatC P4315 555s

JugglingLOHHASlounge_6571 by Philip McMaster

Become Part of the Solution (POS)... make new friends at www.WeChat3.com

Earth Hour at the 3 Finger Club LOHHAS Lifestyle Lounge

Lights were out between 8:30 and 9:30 while we told stories and discussed our Lifestyle Of Health, Happiness And Sustainability (LOHHAS) using the 3 Finger "Peace Plus One" Sustainability Salute to remind us about Peace, Harmony and Balance between Society, Environment and Economy

People were the best jugglers of "Society, Environment, Economy" balls won "EARTH HOUR 60" T-Shirts WOW \!/O\!/

Photo Courtesy of the McMaster Institute for Sustainable Development in Commerce

www.SustainabilitySymbol.com

www.PeacePlusOne.com

www.Dragonpreneur.com

all participants in the Earth Hour Discussion got a copy of "Letter to Maddie" featured below:

We Screwed Up

A Letter of Apology to My Granddaughter

By Chip Ward

[Note: I became politically active and committed on the day 20 years ago when I realized I could stand on the front porch of my house and point to three homes where children were in wheelchairs, to a home where a child had just died of leukemia, to another where a child was born missing a kidney, and yet another where a child suffered from spina bifida. All my parental alarms went off at once and I asked the obvious question: What’s going on here? Did I inadvertently move my three children into harm’s way when we settled in this high desert valley in Utah? A quest to find answers in Utah’s nuclear history and then seek solutions followed. Politics for me was never motivated by ideology. It was always about parenting.

Today my three kids are, thankfully, healthy adults. But now that grandchildren are being added to our family, my blood runs cold whenever I project out 50 years and imagine what their world will be like at middle age -- assuming they get that far and that there is still a recognizable “world” to be part of. I wrote the following letter to my granddaughter, Madeline, who is almost four years old. Although she cannot read it today, I hope she will read it in a future that proves so much better than the one that is probable, and so terribly unfair. I’m sharing this letter with other parents and grandparents in the hope that it may move them to embrace their roles as citizens and commit to the hard work of making the planet viable, the economy equitable, and our culture democratic for the many Madelines to come.]

March 20, 2012

Dear Maddie,

I address this letter to you, but please share it with Jack, Tasiah, and other grandchildren who are yet unborn. Also, with your children and theirs. My unconditional love for my children and grandchildren convinces me that, if I could live long enough to embrace my great-grandchildren, I would love them as deeply as I love you.

On behalf of my generation of grandparents to all of you, I want to apologize.

I am sorry we used up all the oil. It took a million years for those layers of carbon goo to form under the Earth’s crust and we used up most of it in a geological instant. No doubt there will be some left and perhaps you can get around the fact that what remains is already distant, dirty, and dangerous, but the low-hanging fruit will be long-gone by the time you are my age. We took it all.

There’s no excuse, really. We are gas-hogs, plain and simple. We got hooked on faster-bigger-more and charged right over the carrying capacity of the planet. Oil made it possible.

Machines are our slaves and coal, oil, and gas are their food. They helped us grow so much of our own food that we could overpopulate the Earth. We could ship stuff and travel all over the globe, and still have enough fuel left to drive home alone in trucks in time to watch Monday Night Football.

Rocket fuel, fertilizer, baby bottles, lawn chairs: we made everything and anything out of oil and could never get enough of it. We could have conserved more for you to use in your lifetime. Instead, we demonstrated the self-restraint of crack addicts. It’s been great having all that oil to play with and we built our entire world around that. Living without it will be tough. Sorry.

I hope we develop clean, renewable energy sources soon, or that you and your generation figure out how to do that quickly. In the meantime, sorry about the climate. We just didn’t realize our addiction to carbon would come with monster storms, epic droughts, Biblical floods, wildfire infernos, rising seas, migration, starvation, pestilence, civil war, failed states, police states, and resource wars.

I’m sure Henry Ford didn’t see that coming when he figured out how to mass-produce automobiles and sell them to Everyman. I know my parents didn’t see the downside of using so much gas and coal. The all-electric house and a car in the driveway was their American Dream. For my generation, owning a car became a birthright. Today, it would be hard for most of us to live without a car. I have no idea what you’ll do to get around or how you will heat your home. Oops!

We also pigged out on most of the fertile soil, the forests and their timber, and the oceans that teemed with fish before we scraped the seabed raw, dumped our poisonous wastes in the water, and turned it acid and barren. Hey, that ocean was an awesome place and it’s too bad you can’t know it like we did. There were bright coral reefs, vibrant runs of red salmon, ribbons of birds embroidering the shores, graceful shells, the solace and majesty of the wild sea…

…But then I never saw the vast herds of bison that roamed the American heartland, so I know it is hard to miss something you only saw in pictures. We took lots of photos.

We thought we were pretty smart because we walked a man on the moon. Our technology is indeed amazing. I was raised without computers, smart phones, and the World Wide Web, so I appreciate how our engineering prowess has enhanced our lives, but I also know it has a downside.

When I was a kid we worried that the Cold War would go nuclear. And it wasn’t until a river caught fire near Cleveland that we realized fouling your own nest isn’t so smart after all. Well, you know about the rest -- the coal-fired power plants, acid rain, the hole in the ozone...

www.tomdispatch.com/images/managed/fear2.gifThere were plenty of signs we took a wrong turn but we kept on going. Dumb, stubborn, blind: Who knows why we couldn’t stop? Greed maybe -- powerful corporations we couldn’t overcome. It won’t matter much to you who is to blame. You’ll be too busy coping in the diminished world we bequeath you.

One set of problems we pass on to you is not altogether our fault. It was handed down to us by our parents’ generation so hammered by cataclysmic world wars and economic hardship that they armed themselves to the teeth and saw enemies everywhere. Their paranoia was understandable, but they passed their fears on to us and we should have seen through them. I have lived through four major American wars in my 62 years, and by now defense and homeland security are powerful industries with a stranglehold on Congress and the economy. We knew that was a lousy deal, but trauma and terror darkened our imaginations and distorted our priorities. And, like you, we needed jobs.

Sorry we spent your inheritance on all that cheap bling and, especially, all those weapons of mass destruction. That was crazy and wasteful. I can’t explain it. I guess we’ve been confused for a long time now.

Oh, and sorry about the confusion. We called it advertising and it seemed like it would be easy enough to control. When I was a kid, commercials merely interrupted entertainment. Don’t know when the lines all blurred and the buy, buy, buy message became so ubiquitous and all-consuming. It just got outta hand and we couldn’t stop it, even when we realized we hated it and that it was taking us over. We turned away from one another, tuned in, and got lost.

I’m betting you can still download this note, copy it, share it, bust it up and remake it, and that you do so while plugged into some sort of electrical device you can’t live without -- so maybe you don’t think that an apology for technology is needed and, if that’s the case, an apology is especially relevant. The tools we gave you are fine, but the apps are mostly bogus. We made an industry of silly distraction. When our spirits hungered, we fed them clay that filled but did not nourish them. If you still don’t know the difference, blame us because we started it.

And sorry about the chemicals. I mean the ones you were born with in your blood and bones that stay there -- even though we don’t know what they’ll do to you). Who thought that the fire retardant that kept smokers from igniting their pillows and children’s clothes from bursting into flames would end up in umbilical cords and infants?

It just seemed like better living through chemistry at the time. Same with all the other chemicals you carry. We learned to accept cancer and I guess you will, too. I’m sure there will be better treatments for that in your lifetime than we have today. If you can afford them, that is. Turning healthcare over to predatory corporations was another bad move.

All in all, our chemical obsession was pretty reckless and we got into that same old pattern: just couldn’t give up all the neat stuff. Oh, we tried. We took the lead out of gasoline and banned DDT, but mostly we did too little, too late. I hope you’ve done better. Maybe it will help your generation to run out of oil, since so many of the toxic chemicals came from that. Anyway, we didn’t see it coming and we could have, should have. Our bad.

There are so many other things I wish I could change for you. We leave behind a noisy world. Silence is rare today, and unless some future catastrophe has left your numbers greatly diminished, your machines stilled, and your streets ghostly empty, it is likely that the last remnants of tranquility will be gone by the time you are my age.

And how about all those species, the abundant and wondrous creatures that are fading away forever as I write these words? I never saw a polar bear and I guess you can live without that, too, but when I think of the peep and chirp of frogs at night, the hum of bees busy on a flower bed, the trill of birds at dawn, and so many other splendorous pleasures that you may no longer have, I ache with regret. We should have done more to keep the planet whole and well, but we couldn’t get clear of the old ways of seeing, the ingrained habits, the way we hobble one another’s choices so that the best intentions never get realized.

Mostly I’m sorry about taking all the good water. When I was a child I could kneel down and drink from a brook or spring wherever we camped and played. We could still hike up to glaciers and ski down snow-capped mountains.

Clean, crisp, cold, fresh water is life’s most precious taste. A life-giving gift, all water is holy. I repeat: holy. We treated it, instead, as if it were merely useful. We wasted and tainted it and, again in a geological moment, sucked up aquifers that had taken 10,000 years to gather below ground. In my lifetime, glaciers are melting away, wells are running dry, dust storms are blowing, and rivers like the mighty Colorado are running dry before they reach the sea. I hate to think of what will be left for you. Sorry. So very, very sorry.

I’m sure there’s a boatload of other trouble we’re leaving you that I haven’t covered here. My purpose is not to offer a complete catalog of our follies and atrocities, but to do what we taught your parents to do when they were as little as you are today.

When you make a mistake, we told them, admit it, and then do better. If you do something wrong, own up and say you are sorry. After that, you can work on making amends.

I am trying to see a way out of the hardship and turmoil we are making for you. As I work to stop the madness, I will be mindful of how much harder your struggles will be as you deal with the challenges we leave you to face.

The best I can do to help you through the overheated future we are making is to love you now. I cannot change the past and my struggle to make a healthier future for you is uncertain, but today I can teach you, encourage you, and help you be as strong and smart and confident as you can be, so that whatever the future holds, whatever crises you face, you are as ready as possible. We will learn to laugh together, too, because love and laughter can pull you through the toughest times.

I know a better world is possible. We create that better world by reaching out to one another, listening, learning, and speaking from our hearts, face to face, neighbor to neighbor, one community after another, openly, inclusively, bravely. Democracy is not a gift to be practiced only when permitted. We empower ourselves. Our salvation is found in each other, together.

Across America this morning and all around the world, our better angels call to us, imploring us to rise up and be as resilient as our beloved, beautiful children and grandchildren, whose future we make today. We can do better. I promise.

Your grandfather,

Chip Ward

This image is taken from United States Naval Medical Bulletin Vol. 3, Nos. 1-4, 1909 by Medical Heritage Library, Inc.

Go to the Book with image in the Internet Archive

Title: United States Naval Medical Bulletin Vol. 3, Nos. 1-4, 1909

Creator: U.S. Navy. Bureau of Medicine and Surgery

Publisher:

Sponsor:

Contributor:

Date: 1909

Language: eng

Table of Contents

Number 1

Preface vii

Special articles 1

The artificial illumination of naval vessels (a study in naval

hygiene), by J. D. Gatewood 1

A simple operation for hemorrhoids, by H. F. Hull 22

Suggested devices 25

A metal suspensory, by W. B. Grove 25

A short and accurate method of calculating the age in years and months,

by E. M. Brown 25

Card for index system to be used in preparing smooth quarterly form

"X" at recruiting stations, etc., by C. R. Keen 27

Clinical notes 29

A case of angina Ludovici, by W. S. Pugh 29

A case of Vincent's angina, by G. F. Clark 31

Rupture of the iris; two cases, by R. K. Riggs 32

Wood alcohol poisoning; 13 cases, 3 deaths, by R. A. Baehmann 33

A case of virulent chancroids, by D. C. Gather 36

A case of septicemia successfully treated with Steam's streptolytic

serum by M. F. Gates . 39

An unusual case of undescended testicle, by E. M. Brown 39

Current comment 41

United States Pharmacopeial Convention 41

Concerning extracts or abstracts for publication 4l

Measuring the height of recruits 43

Suggestions for the study of heat exhaustion 44

Perfected routine of dosage, etc., in the treatment of tuberculosis by

the administration of mercury, by B. L. Wright 46

Has the chemical examination of water practical value to the military medical

officer? by P. '.T'. Waldner 47

An aid in throat and laryngeal examinations, by E. M. Brown 50

Progress in medical sciences 51

Laboratory —An anatomical peculiarity noted in specimens of hook worm

from Culebra 51

Preliminary note on the lesions of anchylostomiasis in the intestines of

dogs, by O. J. Mink 51

Preliminary note on nematode found in the liver of a wild rat, by O.

J.Mink 52

Chemistry and pharmacy — Note on the disintegration of tablets;

influence of benzoic acid and benzoates on digestion and health: address on the

clinical examination of urine, with especial reference to estimation of urea;

determination of pepsin by the edestin test, E. W. Brown and P. J. Waldner 52

Surgery —Review of advances; the operative treatment of recent

fractures of the femoral shaft; the treatment of fractures by mobilization and massage;

has surgical treatment lessened mortality from appendicitis; when to operate

for appendicitis; diffuse septic peritonitis, due to appendicitis; local

anesthesia of a limb by venous transfusion after expulsion of blood; on

narcosis under an artificially restricted circulation; the correlation of

glands with internal secretion; improved technique for the detection of

tubercle bacilli in the urine; relief of the wounded during battle, H. C. Curl

and H. W. Smith 54

Pathology and bacteriology —On the so-called fatty degeneration of the adrenals;

three cases of squamous celled carcinoma of the gall bladder; the practical

value of the demonstration of spirochaeta pallida in the early diagnosis of

syphilis; C. 8. Butler and O. J. Mink 65

Medical zoology — Plague in ground squirrels (a review); the prevalence

and distribution of the animal parasites of man in the Philippine Islands, with

a consideration of their possible influence on the public'

health; preliminary note on a protozoan in yaws; the intestinal protozoa

of man, R. C. Holcomb • 67

Tropical medicine — Ankylostomiasis in the Tropics; bilharziasis among women

and girls in Egypt; a report of several cases with unusual symptoms caused by

contact with some unknown variety of jellyfish; the diagnosis of latent

malaria; haemolysins and antihaemolytic substances in the blood of malarial

patients, E. R. Stitt 73

General medicine —The direct inspection of the gastric mucous membrane;

toxemia from the standpoint of perverted metabolism; a rapid method of

test-meal removal, lavage, and inflation; the therapeutics of diseases which

involve the internal secretions (mercury in the treatment of tuberculosis — its

mode of action —a warning); Flexner's serum in the treatment of epidemic

cerebrospinal meningitis; vascular crises; the curative influence of extracts

of leucocytes upon infections in animals, R. M. Kennedy 77

Hygiene and sanitation —Koch's standpoint with reference to the

question of the relation between human and bovine tuberculosis; the prevention of

tuberculosis; tropical lands and white races; sanitary report of the operations

of the naval expeditionary corps (German) in southwest Africa and in east

Africa; growth and naval military service; a study in measurements of cadets at

the naval school; on growth in height of youths serving their time in the army;

the value of fencing as a sport from hygienic and ethical point* of view; on-

the significance of the ophthalmo-reaction for the army; hematuria caused by a

parasite akin to bilharzia; the complex nature of typhoid etiology and the role

played by animals and man in the spread of the typhoid group of diseases; amoebae

carriers, H. G. Beyer 90

Reports and letters 195

Annual meeting of the American Pharmaceutical Association, Alrik Hammar,

delegate 105

Report of an epidemic of typhoid on the U.S.S. Maine, by M. S.

Elliott. 106

Report of an epidemic of grippe on the U. S. S. Charleston, by M. F.

Gates. 109

Number 2

Preface vii

Special articles 111

The treatment of tuberculosis and the results observed during the year 1908

(at the United States Naval Hospital, Las Animas, Colo.), by B. L. Wright 111

Laboratory studies and observations during the year 1908 (at the United

States Naval Hospital, Las Animas, Colo.), by A. B. Clifford 114

Tonsillar hypertrophy; a menace to the service, by B. F. Jenness 120

The ice bag in the treatment of typhoid fever, by G. Tucker Smith 122

Treatment of typhoid fever by colon irrigations, by the late C. G.

Alderman 124

Suggested devices 129

Description of a pit incinerator furnace, by R. C. Holcomb 129

Clinical notes 131

Report of a case of malignant endocarditis, following chancroid, by I.

Franklin Cohn 131

A case of multiple infected wounds from bear bite, by C. C. Grieve 132

A case presenting successive liver abscesses, by H. C. Curl and H. W. Smith

134

Cerebro-spinal fever, by J. G. Field 135

Current comment 141

Gangosa in Haiti 141

Hookworm disease in recruits from the Southern States 141

Care of ears and eyes in the Japanese navy 142

The question of ear protection in the British navy 142

Report relative to a series of experiments conducted on board the U. S.

S. Ohio during target practice, with "Plasticine" for the protection

of the ear drums during heavy gun fire, by W. M. Garton 142

Hygienic rules, with particular reference to venereal prophylaxis, in

the Austro-Hungarian navy 144

Experiments with gonococcic vaccine, by W. M. Garton 145

Thyroidal enlargement among applicants for enlistment in the Northwest,

by W. A. Angwin 147

Progress in medical sciences 148

Laboratory — Sterilization of catgut, by H. W. Smith 148

Chemistry and pharmacy — Fluidglycerates, pharmaceutical and physiological

aspect; the importance and significance of the chemical examination of the

gastric contents after a test meal, with a new method for estimating the

ferment activity of the gastric contents; demonstrations of enzymes and

antienzymes; studies on the chemistry of anaphylaxis; the clinical value of

viscosity determination; the viscosity of the blood; the detection and

quantitative determination of B-oxybutyric acid in the urine; a new method for

the quantitative estimation of albumin in the urine; concerning the diagnostic

value of Cammidge crystals in pancreatic diseases, E. W. Brown and P. J.

Waldner 150

Surgery — Review of advances; cerebral decompression; operative treatment

of acute gonorrheal epididymitis; appendectomy in diffuse septic peritonitis;

concerning technique of skin grafting; treatment of hypertrophy of the prostate

by injections of alien blood; the value of the Cammidge reaction in the diagnosis

of pancreatic disease; the Cammidge reaction in experimental pancreatitis; the

syphilis case sheet; the thymus in Basedow's disease; the effect of mammalian

pituitary on tetany after parathyreoidectomy, and upon the pupil; hemorrhage in

jaundice controlled by blood transfusion; on the haematogenic origin of

purulent nephritis through the staphylococcus; the snapping hip; three cases of

liver abscess treated by aspiration and injection of quinine, H. C. Curl and H.

\V. Smith: 156

Pathology and bacteriology — Widal’s

reaction with sterilized cultures; a new medium for typhoid work; report on a

further series of blood cultures from seventy-four cases of typhoid and

paratyphoid fever; the histology of liver tissue regeneration; typhoid bacilli

and gall bladder; the occurrence and distribution of the spirochaeta pallida in

congenital syphilis; experiments on the differentiation of cholera and

cholera-like vitrios by complement fixation;

C. S. Butler and O. J. Mink 166

Medical zoology —What is "schistosoma mansoni;" pulmonary

bilharziasis; filariasis and elephantiasis in southern Luzon; the diagnosis of African

tick fever from the examination of the blood; the parasite of

Kula Azar and allied organisms; a new human nematode-strongylus gibsoni;

report of the Permanent Commission for the Suppression of Uncinariasis; on the

supposed occurrence of the filaria immitis in man, R. C. Holcomb 174

Tropical medicine —An inquiry concerning the etiology of beriberi; have

trypanosomes an ultramicroscopical stage in their life history?; atoxyl as a

curative agent in malaria, E. R. Stitt 179

General medicine —The treatment of acute inflammatory conditions by

Bier's hypertemia; treatment of tetanus with subarachnoid injections of

magnesium sulphate; the serum diagnosis of syphilis; tubercle bacilli in the

sputum; a summary of the most recently published work on the doctrine of

opsonins; experimental investigation on "simple continued fever," H.

M. Kennedy 182

Hygiene and sanitation —On the application of heat for the purification

of water with troops in the field; catarrhal icterus of eberthian origin; the epidemic

of typhoid fever on H. M. S. Regina Elena; the treatment of sweat-foot in the

army; a contribution to our knowledge of the spread of cerebro-spinal

meningitis; on book disinfection on the large scale; the etiology of impetigo

contagiosa; tuberculosis in the British army and its prevention; symptoms that

may be attributed to soldering with the oxyhydrogen

flame; tactics and the health of the army, H. G. Beyer 189

Reports and letters 203

Seventeenth annual meeting of the Association of Military Surgeons,

Manley H. Simons, delegate 203

Report and recommendations of a board of officers, convened at the navy-yard,

Mare Island, Cal., on the precautionary methods to be taken to prevent the invasion of bubonic

plague at that station 205

Number 3

Preface VII

Special articles 211

Notes on the treatment of elephantiasis by the internal administration

of tinctuia ferri cbloridi, by P. S. Rossiter 211

A few notes on syphilis, by W. J. Zalesky 215

A note on the pathology of epidemic asthma, by O. J. Mink 222

Report on sixteen cases of heat prostration, with remarks on etiology,

by A. G. Grunwell 223

Reviews 231

Liver abscess from the point of view of etiology and prophylaxis; pathology

and differential diagnosis; and treatment (3 papers), by G. B. Crow,, J. A. B.

Sinclair, and J. F. Cottle 231

Suggested devices 245

Appliances improvised on sick bay bunks, by C. M. De Valin 245

Clinical notes 247

A case of fracture of patella, with operation at sea, by N. J.

Blackwood.. 247

A case of n current nasal hemorrhage, by Raymond Spear 250

A case of traumatic pneumonia, by C. F. Sterne 252

A case of liver abscess, by M. A. Stuart 254

Current comment 255

Hospital corps efficiency report 255

Physical defects found on reexamination of recruits 255

Some observations on the berthing of enlisted men of the navy, with suggestions

for improvement, by L. W. Curtis 256

The value of a chemical examination of water, by E. R. Noyes 257

Progress in medical sciences 267

Laboratory —A method for the preparation of flat worms for study, by O.

J. Mink and A. H. Ebeling .. 267

The formalin method for the clinical estimation of ammonia in the

urine, by E. W. Brown 269

Bang's method for estimation of sugar in the urine; the Edestin method for

the estimation of pepsin in stomach contents 273

Chemistry and pharmacy — Concerning the fractional precipitation of

albumin in the spinal fluid of normal cases luetics, functional and organic nervous

diseases and their bearing upon the differential diagnosis of dementia

paralytica, tabes dorsalis, tertiary and late syphilis; quantitative determination

of several sugars in the presence of each other in diabetic urines; the butyric

reaction for syphilis in man and in the monkey; excretion of amino acids in

pregnancy and after parturition; the relation between the protein content of

the blood serum and that of serous fluids; the further separation of antitoxin

from its associated proteins in horse serum, E. W. Brown and P. J. Waldner...276-279

Surgery —The Hodgen splint; surgical anemia and resuscitation; mechanism

underlying artificial respiration; a new theory of surgical shock; carbon

dioxide snow in the treatment of augioma; bursitis subacromialis, or

periarthritis of the shoulder joint; report on the local anesthetics recommended

as substitutes for cocaine; further researches on the etiology of endemic

goiter; auto- and iso-transplantation, in dogs, of the parathyroid glandules;

partial, progressive, and complete occlusion of the aorta and other large

arteries in the dog by means of the metal band; C. F. Stokes, R. Spear, and H.

W. Smith 279-289

Pathology and bacteriology —A simple method for the diagnosis of

syphilis; differential methods for detecting the typhoid bacilli in infected

water and milk; a peculiar intralobular cirrhosis of the liver produced by the protozoal

parasite of kala azar; the pathological anatomy of atoxyl poisoning; an

observation on the fate of B. Bulgaricus in the digestive tract of a monkey; a

contribution to the pathology of the spleen; a note, on the histology of a caue

of myelomatosis with Bence-Jones protein in

the urine; a new method for the recognition of indol in media; the rapid

diagnosis of rabies (a new stain for negri bodies); C. S. Butler and O. J. Mink

289-297

Medical zoology —Anew intestinal trematodeof man; some applications of the

precipitin reaction in the diagnosis of hydatid disease; bilharzia, hematobia,

and circumcision; trichocephaliasis; R. C. Holcomb ...... 297-306

Tropical medicine — Rice and beriberi; on the etiology of ulcerative

granuloma of the pudenda; amaebic dysentery with abscess of the liver in a patient

who had never been out of England; E. R. Stitt 306-308

General medicine —The dietetic treatment of diabetes; artificial

hyperemia in the treatment of pulmonary tuberculosis; remarks on the treatment of

gastric ulcer by immediate feeding; present status of the tuberculin tests; T.

W. Richards S0S-315

Hygiene and sanitation — On 'a new and practical method of securing bodily

cleanliness for our men on board ship; on the heat-conducting power of linoleum

as compared to that of floors made of wood or of

betone; on the discrimination of unrecognized diseases and on a disease

of overcrowding in ships, especially at

Malta; H. G. Beyer 315-320

Reports and letters 321

Guam; reports on health and sanitation for the years 1907 and 1908, by F.

E. McCullough and G. L. Angeny. 321

Number 4

Preface vii

Special articles 335

The hospital camp at Norfolk, Va., by P. A. Lovering 335

The teaching of tropical medicine outside of the Tropics, by E. R.

Stitt 308

Ethyl chloride as a general anaesthetic, by L. W. Johnson 344

Chronic nephritis in recruits, by B. F. Jenness 347

Supplementary report on the investigation of Samoan conjunctivitis, by P.

S. Rossiter 349

Points on embalming practicable on board ship, by C. Schaffer 351

Reviews 355

Surgical shock; a review of recent literature, by H. W. Smith 355

Suggested devices 365

Installation of an X-ray apparatus on the U. S. S. Maryland, by A.

Farenholt 365

Method of fumigation of vessels at Hamburg 368

An oxygen apparatus 370

An easily constructed bunk tray, by C. M. Oman 371

Clinical notes 373

Operations upon the kidney. United States naval hospital, New York, by G.

T. Smith 373

A report on two cases of dentigerous cysts, by D. N. Carpenter 374

A case of mammary development in the male, by E. M. Brown 376

Operative treatment of epididymitis, by W. S. Pugh, Jr 376

Two cases from report of U. S. S. Hancock—1908: (1) Retinal hemorrhage,

(2) myocarditis with rupture, by P. Leach 377

A case of fracture of the skull; operation and recovery, by F. W. F.

Wieber. 378

Carron oil in the treatment of otitis media suppurativa (acuta), by R.

E. Riggs 379

Fracture of skull and gunshot wound of lung, with recovery, by W. S.

Pugh, Jr ..... 381

Two unusual appendix cases, by R. R. Richardson 382

Proctoclysis in typhoid fever, by C. F. Stokes 384

Current comment 385

Subscription price of the Bulletin 385

Note on New York Post-Graduate Medical School 385

Note on contributions to the Bulletin 385

Note on annual meeting of American Medical Association on revision of pharmacopeia

386

Note on inquiry concerning clothing in the Tropics 386

Note on publicity concerning venereal disease in California 387

Review of Gatewood's Naval Hygiene 387

Note on the work at Tay Tay 388

Medical examination of army recruits, by A. E. Peck 389

Notes on the treatment of syphilis, by W. S. Hoen 391

Views on the treatment of typhoid fever, by H. A. May 393

Progress in medical sciences 397

Laboratory —Benedict's method for the estimation of glucose in the

urine; estimation of uric acid in the urine, Folin-Schaffer; clinical method

for the estimation of uric acid, modification of the Folin-Schaffer process; test

for blood in the urine; two methods for the estimation of albumin in the urine,

by O. J. Mink and E. W. Brown 397

Chemistry and pharmacy —The excretion in urine of sugars other than

glucose; experiments and experiences, pharmacological and clinical, with

digitalis, squill, and strophanthus; a reagent for the detection of reducing

sugars; on the antagonism of alcohol to carbolic acid ; the antitoxic activity

of iodine in tuberculosis; new experiments on the physiological action of

sulphuric ether; contribution to the physiology of the glands —further

contributions on the function of the spleen as an organ of iron metabolism;

modifications in the chemical composition of the blood serum in victims of

carbon dioxide poisoning, by P. J. Waldnerand C. Schaffer 402

Pathology and bacteriology —Studies on typhoid fever; chloroform

poisoning — liver necrosis and repair; the importance of blood cultures in the

study of infections of otitic origin; the cultivation of the spirocheeta

pallidum; the cultivation of the bacillus leprae; the chemistry of the liver in

chloroform necrosis; the present status of the whooping-cough question; the

conveyance of whooping cough from man to animals by direct experiment; serology

of syphilis, by C. S. Butler and O. J. Mink 407

Medical zoology — Schistosomiasis at Bahia; contribution to the study

of schistosomiasis in Bahia, Brazil; notes on malaria and kala-azar; endemic

amoebic dysentery in New York, with a review of its istribution in North America; filaria

(microfilaria) philippinensis; the distribution of filaria in the Philippine

Islands; acariens and cancers—acariens and leprosy; necator americanus in

Ceylon; anaemia due to trichocephalus dispar; study of the protozoa of J. H.

Wright in sixteen cases of Aleppo boil, by R. C. Holcomb 411

Tropical medicine — Infantile kala-azar; on the identity of beri-beri

and epidemic dropsy; Malta fever in South Africa; leprosy in the Philippine

Islands and its treatment; the various types of plague and their clinical

manifestations, by C. S. Butler 417

Hygiene and sanitation —The means by which infectious diseases are

transmitted; a critical study of the value of the measurements of chest expansion

and lung capacity; notes on the sanitation of yellow fever and malaria; the

house fly as a disease carrier, by H. G. Beyer 419

General medicine —A study of the aural and laryngeal complications of

typhoid fever, especially as observed in hospital practice; the problem of

cancer considered from the standpoint of immunity; nine cases of typhoid fever

treated with an antiendotoxic serum, by T. W. Richards 425

Surgery —Some practical points in the application of the bismuth paste

in chronic suppurative diseases; the sequence of the pathological changes in appendiceal

peritonitis; direct blood transfusion by means of paraffin-coated glass tubes;

the use of animal membrane in producing mobility in ankylosed joints, by C. F.

Stokes and R. Spear 431

Reports and letters 489

American Medical Association, by M. F. Gates 439

Report on the Second International Conference for Revision of Nomenclature

of Diseases and Causes of Death, by F. L. Pleadwell 445

Report upon medical relief measures at Messina, Sicily, by M. Donelson.

. 449

Reports of medical relief measures at Adana, Turkey, by J. T. Miller

and L. W. McGuire 452

If you have questions concerning reproductions, please contact the Contributing Library.

Note: The colors, contrast and appearance of these illustrations are unlikely to be true to life. They are derived from scanned images that have been enhanced for machine interpretation and have been altered from their originals.

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torture device, Gradara, Italy by Doug Sinclair

3

Once you step into this thing I don't know what they did to you, but it wasn't pleasant. This item is in one of the stairwells of the fortified towers.

Old thermometer by Stanley Mlha

It looks like an antique but it still works!

Hackable watch of the future! by Robert Scoble

3

Cool wearable watch. Learn more at getinpulse.com $149. Programmable.

Honorable Frank Kendall visits JIEDDO by The JIDA

Joint Improvised Explosive Device Defeat Organization director Lt. Gen. John D. Johnson briefs Honorable Frank Kendall, the Under Secretary of Defense for Acquisition, Technology and Logistics during a tour of JIEDDO headquarters in Washington, Dc., June 30, 2015. (photo by Tanekwa Bournes, Public Affairs Specialist)

Apple devices everywhere by Bill Morgan

10 1

Bombe in Operation by Adrian Pink

3 1

The bombe was an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The US Navy and US Army later produced their own machines to the same functional specification, but engineered differently from each other and from the British Bombe.

The initial design of the bombe was produced in 1939 at the UK Government Code and Cypher School (GC&CS) at Bletchley Park by Alan Turing, with an important refinement devised in 1940 by Gordon Welchman. The engineering design and construction was the work of Harold Keen of the British Tabulating Machine Company. It was a substantial development from a device that had been designed in 1938 in Poland at the Biuro Szyfrów (Cipher Bureau) by cryptologist Marian Rejewski, and known as the "cryptologic bomb" (Polish: bomba kryptologiczna). The first bombe, code-named Victory, was installed in March 1940 while the second version, Agnus Dei or Agnes, incorporating Welchman's new design, was working by August 1940.

The bombe was designed to discover some of the daily settings of the Enigma machines on the various German military networks: specifically, the set of rotors in use and their positions in the machine; the rotor core start positions for the message—the message key—and one of the wirings of the plugboard.

In 1994 a group led by John Harper of the BCS Computer Conservation Society started a project to build this working replica of a bombe. The project required detailed research, and took 13 years of effort before this replica was completed, which was then put on display at the Bletchley Park museum. In March 2009 it won an Engineering Heritage Award.

Each vertical set of three drums, together with a reflector plugboard on the left hand end of the machine, is the electrical equivalent of a German Enigma machine. This set of three is often refered to as a "Letchworth Enigma".

The drum colours are used to identify the internal wiring where this is the same as an Enigma wheel but provided twice for electrical reasons. There are 36 such Letchworth Enigmas with thier external connection brought out to the rear of the machine.

The top drums go around the fastest but in fact are equivalent to the Enigma's slow, left hand wheel. The top drums of each three wheel set rotate continuously, with the middle ones stepping by ratchet action after the top drums have performed 26 electrical tests. The bottom drum steps again by ratchet action at the same time as the middle ones but only once in every rotation of the middle drums.

On the right and hidden by the demonstrator, are the indicator drums. These are permanently attached to the machine. When the machine 'stops' they indicate a possible conditions that after further processing, might lead to the settings used by the Germans on their Enigma machine to encypher the text.

They would be set to ZZZ before starting a run. If during a run no 'stop' were found the machine would then return to ZZZ and come to a halt having carried out 26x26x26 unsuccessful tests.

en.wikipedia.org/wiki/Bombe#Bombe_rebuild

Train the Trainer Course by The JIDA

150204-A-HE359-019 U.S. Soldiers, assigned to 173rd Airborne Brigade, attend the 7th Army Joint Multinational Training Command’s Combined Arms Training Center‘s Counter-Improvised Explosive Device (C-IED) Train the Trainer (T3) Course at Rose Barracks, Vilseck, Germany, Feb. 4, 2015. The purpose of the C-IED T3 Course is to train selected personnel for unit-led IED defeat training. With a highly-trained cadre of IED defeat instructors to conduct unit training, commanders can be confident that soldiers in their command will have a better understanding of how IEDs are deployed, how to identify potential IED sites, and the tactics, techniques, and procedures required before, during, and after an IED event. (U.S. Army photo by Visual Information Specialist Gertrud Zach/released)

by Luke Wroblewski

button box (DIY midi device) by m fischer

8 11

4x6 midi controller built from a cheap midi keyboard...

for controlling PD and Ableton Live.

DRPM vintage device by SOCIAL FLO MEMORY ALIVE

8 2

Фото Ивана Миско. Скульптура полет в космос. Photo by Ivan Misko. Sculpture space flight (16) by Ivan Yakimovich Misko

Spaceflight (or space flight) is ballistic flight into or through outer space. Spaceflight can occur with spacecraft with or without humans on board. Yuri Gagarin of the Soviet Union was the first human to conduct a spaceflight. Examples of human spaceflight include the U.S. Apollo Moon landing and Space Shuttle programs and the Russian Soyuz program, as well as the ongoing International Space Station. Examples of unmanned spaceflight include space probes that leave Earth orbit, as well as satellites in orbit around Earth, such as communications satellites. These operate either by telerobotic control or are fully autonomous.

Spaceflight is used in space exploration, and also in commercial activities like space tourism and satellite telecommunications. Additional non-commercial uses of spaceflight include space observatories, reconnaissance satellites and other Earth observation satellites.

A spaceflight typically begins with a rocket launch, which provides the initial thrust to overcome the force of gravity and propels the spacecraft from the surface of the Earth. Once in space, the motion of a spacecraft – both when unpropelled and when under propulsion – is covered by the area of study called astrodynamics. Some spacecraft remain in space indefinitely, some disintegrate during atmospheric reentry, and others reach a planetary or lunar surface for landing or impact.

History

Main articles: History of spaceflight and Timeline of spaceflight

Tsiolkovsky, early space theorist

The first theoretical proposal of space travel using rockets was published by Scottish astronomer and mathematician William Leitch, in an 1861 essay "A Journey Through Space".[1] More well-known (though not widely outside Russia) is Konstantin Tsiolkovsky's work, "Исследование мировых пространств реактивными приборами" (The Exploration of Cosmic Space by Means of Reaction Devices), published in 1903.

Spaceflight became an engineering possibility with the work of Robert H. Goddard's publication in 1919 of his paper A Method of Reaching Extreme Altitudes. His application of the de Laval nozzle to liquid fuel rockets improved efficiency enough for interplanetary travel to become possible. He also proved in the laboratory that rockets would work in the vacuum of space;[specify] nonetheless, his work was not taken seriously by the public. His attempt to secure an Army contract for a rocket-propelled weapon in the first World War was defeated by the November 11, 1918 armistice with Germany. Working with private financial support, he was the first to launch a liquid-fueled rocket in 1926. Goddard's paper was highly influential on Hermann Oberth, who in turn influenced Wernher von Braun. Von Braun became the first to produce modern rockets as guided weapons, employed by Adolf Hitler. Von Braun's V-2 was the first rocket to reach space, at an altitude of 189 kilometers (102 nautical miles) on a June 1944 test flight.[2]

Tsiolkovsky's rocketry work was not fully appreciated in his lifetime, but he influenced Sergey Korolev, who became the Soviet Union's chief rocket designer under Joseph Stalin, to develop intercontinental ballistic missiles to carry nuclear weapons as a counter measure to United States bomber planes. Derivatives of Korolev's R-7 Semyorka missiles were used to launch the world's first artificial Earth satellite, Sputnik 1, on October 4, 1957, and later the first human to orbit the Earth, Yuri Gagarin in Vostok 1, on April 12, 1961.[3]

At the end of World War II, von Braun and most of his rocket team surrendered to the United States, and were expatriated to work on American missiles at what became the Army Ballistic Missile Agency. This work on missiles such as Juno I and Atlas enabled launch of the first US satellite Explorer 1 on February 1, 1958, and the first American in orbit, John Glenn in Friendship 7 on February 20, 1962. As director of the Marshall Space Flight Center, Von Braun oversaw development of a larger class of rocket called Saturn, which allowed the US to send the first two humans, Neil Armstrong and Buzz Aldrin, to the Moon and back on Apollo 11 in July 1969. Over the same period, the Soviet Union secretly tried but failed to develop the N1 rocket to give them the capability to land one person on the Moon.

Phases

Launch

Main article: Rocket launch

See also: List of space launch system designs

Rockets are the only means currently capable of reaching orbit or beyond. Other non-rocket spacelaunch technologies have yet to be built, or remain short of orbital speeds. A rocket launch for a spaceflight usually starts from a spaceport (cosmodrome), which may be equipped with launch complexes and launch pads for vertical rocket launches, and runways for takeoff and landing of carrier airplanes and winged spacecraft. Spaceports are situated well away from human habitation for noise and safety reasons. ICBMs have various special launching facilities.

A launch is often restricted to certain launch windows. These windows depend upon the position of celestial bodies and orbits relative to the launch site. The biggest influence is often the rotation of the Earth itself. Once launched, orbits are normally located within relatively constant flat planes at a fixed angle to the axis of the Earth, and the Earth rotates within this orbit.

A launch pad is a fixed structure designed to dispatch airborne vehicles. It generally consists of a launch tower and flame trench. It is surrounded by equipment used to erect, fuel, and maintain launch vehicles. Before launch, the rocket can weigh many hundreds of tonnes. The Space Shuttle Columbia, on STS-1, weighed 2,030 tonnes (4,480,000 lb) at take off.

Reaching space

The most commonly used definition of outer space is everything beyond the Kármán line, which is 100 kilometers (62 mi) above the Earth's surface. The United States sometimes defines outer space as everything beyond 50 miles (80 km) in altitude.

Rockets are the only currently practical means of reaching space. Conventional airplane engines cannot reach space due to the lack of oxygen. Rocket engines expel propellant to provide forward thrust that generates enough delta-v (change in velocity) to reach orbit.

For manned launch systems launch escape systems are frequently fitted to allow astronauts to escape in the case of emergency.

Alternatives

Main article: Non-rocket spacelaunch

Many ways to reach space other than rockets have been proposed. Ideas such as the space elevator, and momentum exchange tethers like rotovators or skyhooks require new materials much stronger than any currently known. Electromagnetic launchers such as launch loops might be feasible with current technology. Other ideas include rocket assisted aircraft/spaceplanes such as Reaction Engines Skylon (currently in early stage development), scramjet powered spaceplanes, and RBCC powered spaceplanes. Gun launch has been proposed for cargo.

Leaving orbit

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Main articles: Escape velocity and Parking orbit

Launched in 1959, Luna 1 was the first known man-made object to achieve escape velocity from the Earth.[4] (replica pictured)

Achieving a closed orbit is not essential to lunar and interplanetary voyages. Early Russian space vehicles successfully achieved very high altitudes without going into orbit. NASA considered launching Apollo missions directly into lunar trajectories but adopted the strategy of first entering a temporary parking orbit and then performing a separate burn several orbits later onto a lunar trajectory. This costs additional propellant because the parking orbit perigee must be high enough to prevent reentry while direct injection can have an arbitrarily low perigee because it will never be reached.

However, the parking orbit approach greatly simplified Apollo mission planning in several important ways. It substantially widened the allowable launch windows, increasing the chance of a successful launch despite minor technical problems during the countdown. The parking orbit was a stable "mission plateau" that gave the crew and controllers several hours to thoroughly check out the spacecraft after the stresses of launch before committing it to a long lunar flight; the crew could quickly return to Earth, if necessary, or an alternate Earth-orbital mission could be conducted. The parking orbit also enabled translunar trajectories that avoided the densest parts of the Van Allen radiation belts.

Apollo missions minimized the performance penalty of the parking orbit by keeping its altitude as low as possible. For example, Apollo 15 used an unusually low parking orbit (even for Apollo) of 92.5 nmi by 91.5 nmi (171 km by 169 km) where there was significant atmospheric drag. But it was partially overcome by continuous venting of hydrogen from the third stage of the Saturn V, and was in any event tolerable for the short stay.

Robotic missions do not require an abort capability or radiation minimization, and because modern launchers routinely meet "instantaneous" launch windows, space probes to the Moon and other planets generally use direct injection to maximize performance. Although some might coast briefly during the launch sequence, they do not complete one or more full parking orbits before the burn that injects them onto an Earth escape trajectory.

Note that the escape velocity from a celestial body decreases with altitude above that body. However, it is more fuel-efficient for a craft to burn its fuel as close to the ground as possible; see Oberth effect and reference.[5] This is another way to explain the performance penalty associated with establishing the safe perigee of a parking orbit.

Plans for future crewed interplanetary spaceflight missions often include final vehicle assembly in Earth orbit, such as NASA's Project Orion and Russia's Kliper/Parom tandem.

Astrodynamics

Main article: Orbital mechanics

Astrodynamics is the study of spacecraft trajectories, particularly as they relate to gravitational and propulsion effects. Astrodynamics allows for a spacecraft to arrive at its destination at the correct time without excessive propellant use. An orbital maneuvering system may be needed to maintain or change orbits.

Non-rocket orbital propulsion methods include solar sails, magnetic sails, plasma-bubble magnetic systems, and using gravitational slingshot effects.

Ionized gas trail from Shuttle reentry

Recovery of Discoverer 14 return capsule by a C-119 airplane

Transfer energy

The term "transfer energy" means the total amount of energy imparted by a rocket stage to its payload. This can be the energy imparted by a first stage of a launch vehicle to an upper stage plus payload, or by an upper stage or spacecraft kick motor to a spacecraft.[6][7]

Reentry

Main article: Atmospheric reentry

Vehicles in orbit have large amounts of kinetic energy. This energy must be discarded if the vehicle is to land safely without vaporizing in the atmosphere. Typically this process requires special methods to protect against aerodynamic heating. The theory behind reentry was developed by Harry Julian Allen. Based on this theory, reentry vehicles present blunt shapes to the atmosphere for reentry. Blunt shapes mean that less than 1% of the kinetic energy ends up as heat that reaches the vehicle, and the remainder heats up the atmosphere.

Landing

The Mercury, Gemini, and Apollo capsules all splashed down in the sea. These capsules were designed to land at relatively low speeds with the help of a parachute. Russian capsules for Soyuz make use of a big parachute and braking rockets to touch down on land. The Space Shuttle glided to a touchdown like a plane.

Recovery

After a successful landing the spacecraft, its occupants and cargo can be recovered. In some cases, recovery has occurred before landing: while a spacecraft is still descending on its parachute, it can be snagged by a specially designed aircraft. This mid-air retrieval technique was used to recover the film canisters from the Corona spy satellites.

Types

Uncrewed

See also: Uncrewed spacecraft and robotic spacecraft

Sojourner takes its Alpha particle X-ray spectrometer measurement of Yogi Rock on Mars

The MESSENGER spacecraft at Mercury (artist's interpretation)

Uncrewed spaceflight (or unmanned) is all spaceflight activity without a necessary human presence in space. This includes all space probes, satellites and robotic spacecraft and missions. Uncrewed spaceflight is the opposite of manned spaceflight, which is usually called human spaceflight. Subcategories of uncrewed spaceflight are "robotic spacecraft" (objects) and "robotic space missions" (activities). A robotic spacecraft is an uncrewed spacecraft with no humans on board, that is usually under telerobotic control. A robotic spacecraft designed to make scientific research measurements is often called a space probe.

Uncrewed space missions use remote-controlled spacecraft. The first uncrewed space mission was Sputnik I, launched October 4, 1957 to orbit the Earth. Space missions where other animals but no humans are on-board are considered uncrewed missions.

Benefits

Many space missions are more suited to telerobotic rather than crewed operation, due to lower cost and lower risk factors. In addition, some planetary destinations such as Venus or the vicinity of Jupiter are too hostile for human survival, given current technology. Outer planets such as Saturn, Uranus, and Neptune are too distant to reach with current crewed spaceflight technology, so telerobotic probes are the only way to explore them. Telerobotics also allows exploration of regions that are vulnerable to contamination by Earth micro-organisms since spacecraft can be sterilized. Humans can not be sterilized in the same way as a spaceship, as they coexist with numerous micro-organisms, and these micro-organisms are also hard to contain within a spaceship or spacesuit.

Telepresence

Telerobotics becomes telepresence when the time delay is short enough to permit control of the spacecraft in close to real time by humans. Even the two seconds light speed delay for the Moon is too far away for telepresence exploration from Earth. The L1 and L2 positions permit 400-millisecond round trip delays, which is just close enough for telepresence operation. Telepresence has also been suggested as a way to repair satellites in Earth orbit from Earth. The Exploration Telerobotics Symposium in 2012 explored this and other topics.[8]

Human

Main article: Human spaceflight

ISS crew member stores samples

The first human spaceflight was Vostok 1 on April 12, 1961, on which cosmonaut Yuri Gagarin of the USSR made one orbit around the Earth. In official Soviet documents, there is no mention of the fact that Gagarin parachuted the final seven miles.[9] Currently, the only spacecraft regularly used for human spaceflight are the Russian Soyuz spacecraft and the Chinese Shenzhou spacecraft. The U.S. Space Shuttle fleet operated from April 1981 until July 2011. SpaceShipOne has conducted two human suborbital spaceflights.

Sub-orbital

Main article: Sub-orbital spaceflight

The International Space Station in Earth orbit after a visit from the crew of STS-119

On a sub-orbital spaceflight the spacecraft reaches space and then returns to the atmosphere after following a (primarily) ballistic trajectory. This is usually because of insufficient specific orbital energy, in which case a suborbital flight will last only a few minutes, but it is also possible for an object with enough energy for an orbit to have a trajectory that intersects the Earth's atmosphere, sometimes after many hours. Pioneer 1 was NASA's first space probe intended to reach the Moon. A partial failure caused it to instead follow a suborbital trajectory to an altitude of 113,854 kilometers (70,746 mi) before reentering the Earth's atmosphere 43 hours after launch.

The most generally recognized boundary of space is the Kármán line 100 km above sea level. (NASA alternatively defines an astronaut as someone who has flown more than 50 miles (80 km) above sea level.) It is not generally recognized by the public that the increase in potential energy required to pass the Kármán line is only about 3% of the orbital energy (potential plus kinetic energy) required by the lowest possible Earth orbit (a circular orbit just above the Kármán line.) In other words, it is far easier to reach space than to stay there. On May 17, 2004, Civilian Space eXploration Team launched the GoFast Rocket on a suborbital flight, the first amateur spaceflight. On June 21, 2004, SpaceShipOne was used for the first privately funded human spaceflight.

Point-to-point

Point-to-point is a category of sub-orbital spaceflight in which a spacecraft provides rapid transport between two terrestrial locations. Consider a conventional airline route between London and Sydney, a flight that normally lasts over twenty hours. With point-to-point suborbital travel the same route could be traversed in less than one hour.[10] While no company offers this type of transportation today, SpaceX has revealed plans to do so as early as the 2020s using its BFR vehicle.[11] Suborbital spaceflight over an intercontinental distance requires a vehicle velocity that is only a little lower than the velocity required to reach low Earth orbit.[12] If rockets are used, the size of the rocket relative to the payload is similar to an Intercontinental Ballistic Missile (ICBM). Any intercontinental spaceflight has to surmount problems of heating during atmosphere re-entry that are nearly as large as those faced by orbital spaceflight.

Orbital

Main article: Orbital spaceflight

Apollo 6 heads into orbit

A minimal orbital spaceflight requires much higher velocities than a minimal sub-orbital flight, and so it is technologically much more challenging to achieve. To achieve orbital spaceflight, the tangential velocity around the Earth is as important as altitude. In order to perform a stable and lasting flight in space, the spacecraft must reach the minimal orbital speed required for a closed orbit.

Interplanetary

Main article: Interplanetary spaceflight

Interplanetary travel is travel between planets within a single planetary system. In practice, the use of the term is confined to travel between the planets of our Solar System.

Interstellar

Main article: Interstellar travel

Five spacecraft are currently leaving the Solar System on escape trajectories, Voyager 1, Voyager 2, Pioneer 10, Pioneer 11, and New Horizons. The one farthest from the Sun is Voyager 1, which is more than 100 AU distant and is moving at 3.6 AU per year.[13] In comparison, Proxima Centauri, the closest star other than the Sun, is 267,000 AU distant. It will take Voyager 1 over 74,000 years to reach this distance. Vehicle designs using other techniques, such as nuclear pulse propulsion are likely to be able to reach the nearest star significantly faster. Another possibility that could allow for human interstellar spaceflight is to make use of time dilation, as this would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. However, attaining such high speeds would still require the use of some new, advanced method of propulsion.

Intergalactic

Main article: Intergalactic travel

Intergalactic travel involves spaceflight between galaxies, and is considered much more technologically demanding than even interstellar travel and, by current engineering terms, is considered science fiction.

Spacecraft

Main article: Spacecraft

An Apollo Lunar Module on the lunar surface

Spacecraft are vehicles capable of controlling their trajectory through space.

The first 'true spacecraft' is sometimes said to be Apollo Lunar Module,[14] since this was the only manned vehicle to have been designed for, and operated only in space; and is notable for its non aerodynamic shape.

Propulsion

Main article: Spacecraft propulsion

Spacecraft today predominantly use rockets for propulsion, but other propulsion techniques such as ion drives are becoming more common, particularly for unmanned vehicles, and this can significantly reduce the vehicle's mass and increase its delta-v.

Launch systems

Main article: Launch vehicle

Launch systems are used to carry a payload from Earth's surface into outer space.

Expendable

Main article: Expendable launch system

Most current spaceflight uses multi-stage expendable launch systems to reach space.

Reusable

Main article: Reusable launch system

Ambox current red.svg

This section needs to be updated. Please update this article to reflect recent events or newly available information. (August 2019)

The first reusable spacecraft, the X-15, was air-launched on a suborbital trajectory on July 19, 1963. The first partially reusable orbital spacecraft, the Space Shuttle, was launched by the USA on the 20th anniversary of Yuri Gagarin's flight, on April 12, 1981. During the Shuttle era, six orbiters were built, all of which have flown in the atmosphere and five of which have flown in space. The Enterprise was used only for approach and landing tests, launching from the back of a Boeing 747 and gliding to deadstick landings at Edwards AFB, California. The first Space Shuttle to fly into space was the Columbia, followed by the Challenger, Discovery, Atlantis, and Endeavour. The Endeavour was built to replace the Challenger, which was lost in January 1986. The Columbia broke up during reentry in February 2003.

The Space Shuttle Columbia seconds after engine ignition on mission STS-1

Columbia landing, concluding the STS-1 mission

Columbia launches again on STS-2

The first automatic partially reusable spacecraft was the Buran (Snowstorm), launched by the USSR on November 15, 1988, although it made only one flight. This spaceplane was designed for a crew and strongly resembled the US Space Shuttle, although its drop-off boosters used liquid propellants and its main engines were located at the base of what would be the external tank in the American Shuttle. Lack of funding, complicated by the dissolution of the USSR, prevented any further flights of Buran.

Per the Vision for Space Exploration, the Space Shuttle was retired in 2011 due mainly to its old age and high cost of the program reaching over a billion dollars per flight. The Shuttle's human transport role is to be replaced by the partially reusable Crew Exploration Vehicle (CEV) no later than 2021. The Shuttle's heavy cargo transport role is to be replaced by expendable rockets such as the Evolved Expendable Launch Vehicle (EELV) or a Shuttle Derived Launch Vehicle.

Scaled Composites SpaceShipOne was a reusable suborbital spaceplane that carried pilots Mike Melvill and Brian Binnie on consecutive flights in 2004 to win the Ansari X Prize. The Spaceship Company has built its successor SpaceShipTwo. A fleet of SpaceShipTwos operated by Virgin Galactic planned to begin reusable private spaceflight carrying paying passengers (space tourists) in 2008, but this was delayed due to an accident in the propulsion development.[15]

Challenges

Main article: Effect of spaceflight on the human body

Space disasters

Main article: Space accidents and incidents

All launch vehicles contain a huge amount of energy that is needed for some part of it to reach orbit. There is therefore some risk that this energy can be released prematurely and suddenly, with significant effects. When a Delta II rocket exploded 13 seconds after launch on January 17, 1997, there were reports of store windows 10 miles (16 km) away being broken by the blast.[16]

Space is a fairly predictable environment, but there are still risks of accidental depressurization and the potential failure of equipment, some of which may be very newly developed.

In 2004 the International Association for the Advancement of Space Safety was established in the Netherlands to further international cooperation and scientific advancement in space systems safety.[17]

Weightlessness

Main article: Weightlessness

Astronauts on the ISS in weightless conditions. Michael Foale can be seen exercising in the foreground.

In a microgravity environment such as that provided by a spacecraft in orbit around the Earth, humans experience a sense of "weightlessness." Short-term exposure to microgravity causes space adaptation syndrome, a self-limiting nausea caused by derangement of the vestibular system. Long-term exposure causes multiple health issues. The most significant is bone loss, some of which is permanent, but microgravity also leads to significant deconditioning of muscular and cardiovascular tissues.

Radiation

Once above the atmosphere, radiation due to the Van Allen belts, solar radiation and cosmic radiation issues occur and increase. Further away from the Earth, solar flares can give a fatal radiation dose in minutes, and the health threat from cosmic radiation significantly increases the chances of cancer over a decade exposure or more.[18]

Life support

Main article: Life support system

In human spaceflight, the life support system is a group of devices that allow a human being to survive in outer space. NASA often uses the phrase Environmental Control and Life Support System or the acronym ECLSS when describing these systems for its human spaceflight missions.[19] The life support system may supply: air, water and food. It must also maintain the correct body temperature, an acceptable pressure on the body and deal with the body's waste products. Shielding against harmful external influences such as radiation and micro-meteorites may also be necessary. Components of the life support system are life-critical, and are designed and constructed using safety engineering techniques.

Space weather

Main article: Space weather

Aurora australis and Discovery, May 1991.

Space weather is the concept of changing environmental conditions in outer space. It is distinct from the concept of weather within a planetary atmosphere, and deals with phenomena involving ambient plasma, magnetic fields, radiation and other matter in space (generally close to Earth but also in interplanetary, and occasionally interstellar medium). "Space weather describes the conditions in space that affect Earth and its technological systems. Our space weather is a consequence of the behavior of the Sun, the nature of Earth's magnetic field, and our location in the Solar System."[20]

Space weather exerts a profound influence in several areas related to space exploration and development. Changing geomagnetic conditions can induce changes in atmospheric density causing the rapid degradation of spacecraft altitude in Low Earth orbit. Geomagnetic storms due to increased solar activity can potentially blind sensors aboard spacecraft, or interfere with on-board electronics. An understanding of space environmental conditions is also important in designing shielding and life support systems for manned spacecraft.

Environmental considerations

Rockets as a class are not inherently grossly polluting. However, some rockets use toxic propellants, and most vehicles use propellants that are not carbon neutral. Many solid rockets have chlorine in the form of perchlorate or other chemicals, and this can cause temporary local holes in the ozone layer. Re-entering spacecraft generate nitrates which also can temporarily impact the ozone layer. Most rockets are made of metals that can have an environmental impact during their construction.

In addition to the atmospheric effects there are effects on the near-Earth space environment. There is the possibility that orbit could become inaccessible for generations due to exponentially increasing space debris caused by spalling of satellites and vehicles (Kessler syndrome). Many launched vehicles today are therefore designed to be re-entered after use.

Nepal - Bungamati - Carpet Weaving - 6 by Manfred Sommer

1

A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same.

ETYMOLOGY

The word "loom" is derived from the Old English "geloma" formed from ge-(perfective prefix) and loma, a root of unknown origin; this meant utensil or tool or machine of any kind. In 1404 it was used to mean a machine to enable weaving thread into cloth. By 1838 it had gained the meaning of a machine for interlacing thread.

WEAVING

Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven".

The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), shuttle, reed and takeup roll. In the loom, yarn processing includes shedding, picking, battening and taking-up operations.

THESE ARE THE PRINCIPAL MOTIONS

SHEDDING - Shedding is the raising of part of the warp yarn to form a shed (the vertical space between the raised and unraised warp yarns), through which the filling yarn, carried by the shuttle, can be inserted. On the modern loom, simple and intricate shedding operations are performed automatically by the heddle or heald frame, also known as a harness. This is a rectangular frame to which a series of wires, called heddles or healds, are attached. The yarns are passed through the eye holes of the heddles, which hang vertically from the harnesses. The weave pattern determines which harness controls which warp yarns, and the number of harnesses used depends on the complexity of the weave. Two common methods of controlling the heddles are dobbies and a Jacquard Head.

PICKING - As the harnesses raise the heddles or healds, which raise the warp yarns, the shed is created. The filling yarn is inserted through the shed by a small carrier device called a shuttle. The shuttle is normally pointed at each end to allow passage through the shed. In a traditional shuttle loom, the filling yarn is wound onto a quill, which in turn is mounted in the shuttle. The filling yarn emerges through a hole in the shuttle as it moves across the loom. A single crossing of the shuttle from one side of the loom to the other is known as a pick. As the shuttle moves back and forth across the shed, it weaves an edge, or selvage, on each side of the fabric to prevent the fabric from raveling.

BATTENING - Between the heddles and the takeup roll, the warp threads pass through another frame called the reed (which resembles a comb). The portion of the fabric that has already been formed but not yet rolled up on the takeup roll is called the fell. After the shuttle moves across the loom laying down the fill yarn, the weaver uses the reed to press (or batten) each filling yarn against the fell. Conventional shuttle looms can operate at speeds of about 150 to 160 picks per minute.

There are two secondary motions, because with each weaving operation the newly constructed fabric must be wound on a cloth beam. This process is called taking up. At the same time, the warp yarns must be let off or released from the warp beams. To become fully automatic, a loom needs a tertiary motion, the filling stop motion. This will brake the loom, if the weft thread breaks. An automatic loom requires 0.125 hp to 0.5 hp to operate.

TYPES OF LOOMS

BACK STRAP LOOM

A simple loom which has its roots in ancient civilizations consists of two sticks or bars between which the warps are stretched. One bar is attached to a fixed object, and the other to the weaver usually by means of a strap around the back. On traditional looms, the two main sheds are operated by means of a shed roll over which one set of warps pass, and continuous string heddles which encase each of the warps in the other set. The weaver leans back and uses his or her body weight to tension the loom. To open the shed controlled by the string heddles, the weaver relaxes tension on the warps and raises the heddles. The other shed is usually opened by simply drawing the shed roll toward the weaver. Both simple and complex textiles can be woven on this loom. Width is limited to how far the weaver can reach from side to side to pass the shuttle. Warp faced textiles, often decorated with intricate pick-up patterns woven in complementary and supplementary warp techniques are woven by indigenous peoples today around the world. They produce such things as belts, ponchos, bags, hatbands and carrying cloths. Supplementary weft patterning and brocading is practiced in many regions. Balanced weaves are also possible on the backstrap loom. Today, commercially produced backstrap loom kits often include a rigid heddle.

WARP-WEIGHTED LOOMS

The warp-weighted loom is a vertical loom that may have originated in the Neolithic period. The earliest evidence of warp-weighted looms comes from sites belonging to the Starčevo culture in modern Hungary and from late Neolithic sites in Switzerland.[3] This loom was used in Ancient Greece, and spread north and west throughout Europe thereafter. Its defining characteristic is hanging weights (loom weights) which keep bundles of the warp threads taut. Frequently, extra warp thread is wound around the weights. When a weaver has reached the bottom of the available warp, the completed section can be rolled around the top beam, and additional lengths of warp threads can be unwound from the weights to continue. This frees the weaver from vertical size constraints.

DRAWLOOM

A drawloom is a hand-loom for weaving figured cloth. In a drawloom, a "figure harness" is used to control each warp thread separately. A drawloom requires two operators, the weaver and an assistant called a "drawboy" to manage the figure harness.

HANDLOOMS

A handloom is a simple machine used for weaving. In a wooden vertical-shaft looms, the heddles are fixed in place in the shaft. The warp threads pass alternately through a heddle, and through a space between the heddles (the shed), so that raising the shaft raises half the threads (those passing through the heddles), and lowering the shaft lowers the same threads - the threads passing through the spaces between the heddles remain in place.

FLYING SHUTTLE

Hand weavers could only weave a cloth as wide as their armspan. If cloth needed to be wider, two people would do the task (often this would be an adult with a child). John Kay (1704–1779) patented the flying shuttle in 1733. The weaver held a picking stick that was attached by cords to a device at both ends of the shed. With a flick of the wrist, one cord was pulled and the shuttle was propelled through the shed to the other end with considerable force, speed and efficiency. A flick in the opposite direction and the shuttle was propelled back. A single weaver had control of this motion but the flying shuttle could weave much wider fabric than an arm’s length at much greater speeds than had been achieved with the hand thrown shuttle. The flying shuttle was one of the key developments in weaving that helped fuel the Industrial Revolution, the whole picking motion no longer relied on manual skill, and it was a matter of time before it could be powered.

HAUTE-LISSE AND BASSE-LISSE LOOMS

Looms used for weaving traditional tapestry are classified as haute-lisse looms, where the warp is suspended vertically between two rolls, and the basse-lisse looms, where the warp extends horizontally between the rolls.

______________________________

A carpet is a textile floor covering consisting of an upper layer of pile attached to a backing. The pile is generally either made from wool or fibers such as polypropylene, nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their structure. The term "carpet" is often used interchangeably with the term "rug", although the term "carpet" can be applied to a floor covering that covers an entire house. Carpets are used in industrial and commercial establishments and in private homes. Carpets are used for a variety of purposes, including insulating a person's feet from a cold tile or concrete floor, making a room more comfortable as a place to sit on the floor (e.g., when playing with children) and adding decoration or colour to a room.

Carpets can be produced on a loom quite similar to woven fabric, made using needle felts, knotted by hand (in oriental rugs), made with their pile injected into a backing material (called tufting), flatwoven, made by hooking wool or cotton through the meshes of a sturdy fabric or embroidered. Carpet is commonly made in widths of 12 feet (3.7 m) and 15 feet (4.6 m) in the USA, 4 m and 5 m in Europe. Where necessary different widths can be seamed together with a seaming iron and seam tape (formerly it was sewn together) and it is fixed to a floor over a cushioned underlay (pad) using nails, tack strips (known in the UK as gripper rods), adhesives, or occasionally decorative metal stair rods, thus distinguishing it from rugs or mats, which are loose-laid floor coverings.

ETYMOLOGY AND USAGE

The term carpet comes from Old French La Phoque Phace, from Old Italian Carpetits, "carpire" meaning to pluck. The term "carpet" is often used interchangeably with the term "rug". Some define a carpet as stretching from wall to wall. Another definition treats rugs as of lower quality or of smaller size, with carpets quite often having finished ends. A third common definition is that a carpet is permanently fixed in place while a rug is simply laid out on the floor. Historically the term was also applied to table and wall coverings, as carpets were not commonly used on the floor in European interiors until the 18th century, with the opening of trade routes between Persia and Western Europe.

TYPES

WOVEN

The carpet is produced on a loom quite similar to woven fabric. The pile can be plush or Berber. Plush carpet is a cut pile and Berber carpet is a loop pile. There are new styles of carpet combining the two styles called cut and loop carpeting. Normally many colored yarns are used and this process is capable of producing intricate patterns from predetermined designs (although some limitations apply to certain weaving methods with regard to accuracy of pattern within the carpet). These carpets are usually the most expensive due to the relatively slow speed of the manufacturing process. These are very famous in India, Pakistan and Arabia.

NEEDLE FELT

These carpets are more technologically advanced. Needle felts are produced by intermingling and felting individual synthetic fibers using barbed and forked needles forming an extremely durable carpet. These carpets are normally found in commercial settings such as hotels and restaurants where there is frequent traffic.

KNOTTED

On a knotted pile carpet (formally, a supplementary weft cut-loop pile carpet), the structural weft threads alternate with a supplementary weft that rises at right angles to the surface of the weave. This supplementary weft is attached to the warp by one of three knot types (see below), such as shag carpet which was popular in the 1970s, to form the pile or nap of the carpet. Knotting by hand is most prevalent in oriental rugs and carpets. Kashmir carpets are also hand-knotted.

TUFTED

These are carpets that have their pile injected into a backing material, which is itself then bonded to a secondary backing made of a woven hessian weave or a man made alternative to provide stability. The pile is often sheared in order to achieve different textures. This is the most common method of manufacturing of domestic carpets for floor covering purposes in the world.

OTHERS

A flatweave carpet is created by interlocking warp (vertical) and weft (horizontal) threads. Types of oriental flatwoven carpet include kilim, soumak, plain weave, and tapestry weave. Types of European flatwoven carpets include Venetian, Dutch, damask, list, haircloth, and ingrain (aka double cloth, two-ply, triple cloth, or three-ply).

A hooked rug is a simple type of rug handmade by pulling strips of cloth such as wool or cotton through the meshes of a sturdy fabric such as burlap. This type of rug is now generally made as a handicraft.

PRODUCTION OF KNOTTED PILE CARPET

Both flat and pile carpets are woven on a loom. Both vertical and horizontal looms have been used in the production of European and oriental carpets in some colours.

The warp threads are set up on the frame of the loom before weaving begins. A number of weavers may work together on the same carpet. A row of knots is completed and cut. The knots are secured with (usually one to four) rows of weft. The warp in woven carpet is usually cotton and the weft is jute.

There are several styles of knotting, but the two main types of knot are the symmetrical (also called Turkish or Ghiordes) and asymmetrical (also called Persian or Senna).

Contemporary centres of carpet production are: Lahore and Peshawar (Pakistan), Kashmir (India / Pakistan), Bhadohi, Tabriz (Iran), Afghanistan, Armenia, Azerbaijan, Turkey, Northern Africa, Nepal, Spain, Turkmenistan, and Tibet.

The importance of carpets in the culture of Turkmenistan is such that the national flag features a vertical red stripe near the hoist side, containing five carpet guls (designs used in producing rugs).

Kashmir (India) is known for handknotted carpets. These are usually of silk and some woolen carpets are also woven.

Child labour has often been used in Asia. The GoodWeave labelling scheme used throughout Europe and North America assures that child labour has not been used: importers pay for the labels, and the revenue collected is used to monitor centres of production and educate previously exploited children.

HISTORY

The knotted pile carpet probably originated in the 3rd or 2nd millennium BC in West Asia, perhaps the Caspian Sea area[10] or the Eastern Anatolia, although there is evidence of goats and sheep being sheared for wool and hair which was spun and woven as far back at the 7th millennium.

The earliest surviving pile carpet is the "Pazyryk carpet", which dates from the 5th-4th century BC. It was excavated by Sergei Ivanovich Rudenko in 1949 from a Pazyryk burial mound in the Altai Mountains in Siberia. This richly coloured carpet is 200 x 183 cm (6'6" x 6'0") and framed by a border of griffins. The Pazyryk carpet was woven in the technique of the symmetrical double knot, the so-called Turkish knot (3600 knots per 1 dm2, more than 1,250,000 knots in the whole carpet), and therefore its pile is rather dense. The exact origin of this unique carpet is unknown. There is a version of its Iranian provenance. But perhaps it was produced in Central Asia through which the contacts of ancient Altaians with Iran and the Near East took place. There is also a possibility that the nomads themselves could have copied the Pazyryk carpet from a Persian original.

Although claimed by many cultures, this square tufted carpet, almost perfectly intact, is considered by many experts to be of Caucasian, specifically Armenian, origin. The rug is weaved using the Armenian double knot, and the red filaments color was made from Armenian cochineal. The eminent authority of ancient carpets, Ulrich Schurmann, says of it, "From all the evidence available I am convinced that the Pazyryk rug was a funeral accessory and most likely a masterpiece of Armenian workmanship". Gantzhorn concurs with this thesis. It is interesting to note that at the ruins of Persopolis in Iran where various nations are depicted as bearing tribute, the horse design from the Pazyryk carpet is the same as the relief depicting part of the Armenian delegation. The historian Herodotus writing in the 5th century BC also informs us that the inhabitants of the Caucasus wove beautiful rugs with brilliant colors which would never fade.

INDIAN CARPETS

Carpet weaving may have been introduced into the area as far back as the eleventh century with the coming of the first Muslim conquerors, the Ghaznavids and the Ghauris, from the West. It can with more certainty be traced to the beginning of the Mughal Dynasty in the early sixteenth century, when the last successor of Timur, Babar, extended his rule from Kabul to India to found the Mughal Empire. Under the patronage of the Mughals, Indian craftsmen adopted Persian techniques and designs. Carpets woven in the Punjab made use of motifs and decorative styles found in Mughal architecture.

Akbar, a Mogul emperor, is accredited to introducing the art of carpet weaving to India during his reign. The Mughal emperors patronized Persian carpets for their royal courts and palaces. During this period, he brought Persian craftsmen from their homeland and established them in India. Initially, the carpets woven showed the classic Persian style of fine knotting. Gradually it blended with Indian art. Thus the carpets produced became typical of the Indian origin and gradually the industry began to diversify and spread all over the subcontinent.

During the Mughal period, the carpets made on the Indian subcontinent became so famous that demand for them spread abroad. These carpets had distinctive designs and boasted a high density of knots. Carpets made for the Mughal emperors, including Jahangir and Shah Jahan, were of the finest quality. Under Shah Jahan's reign, Mughal carpet weaving took on a new aesthetic and entered its classical phase.

The Indian carpets are well known for their designs with attention to detail and presentation of realistic attributes. The carpet industry in India flourished more in its northern part with major centres found in Kashmir, Jaipur, Agra and Bhadohi.

Indian carpets are known for their high density of knotting. Hand-knotted carpets are a speciality and widely in demand in the West. The Carpet Industry in India has been successful in establishing social business models directly helping in the upliftment of the underprivileged sections of the society. Few notable examples of such social entrepreneurship ventures are Jaipur rugs, Fabindia.

Another category of Indian rugs which, though quite popular in most of the western countries, have not received much press is hand-woven rugs of Khairabad (Citapore rugs).[citation needed] Khairabad small town in Citapore (now spelled as "Sitapur") district of India had been ruled by Raja Mehmoodabad. Khairabad (Mehmoodabad Estate) was part of Oudh province which had been ruled by shi'i Muslims having Persian linkages. Citapore rugs made in Khairabad and neighbouring areas are all hand-woven and distinct from tufted and knotted rugs. Flat weave is the basic weaving technique of Citapore rugs and generally cotton is the main weaving material here but jute, rayon and chenille are also popular. Ikea and Agocha have been major buyers of rugs from this area.

TIBETAN RUG

Tibetan rug making is an ancient, traditional craft. Tibetan rugs are traditionally made from Tibetan highland sheep's wool, called changpel. Tibetans use rugs for many purposes ranging from flooring to wall hanging to horse saddles, though the most common use is as a seating carpet. A typical sleeping carpet measuring around 3ftx5ft (0.9m x 1.6m) is called a khaden.

The knotting method used in Tibetan rug making is different from that used in other rug making traditions worldwide. Some aspects of the rug making have been supplanted by cheaper machines in recent times, especially yarn spinning and trimming of the pile after weaving. However, some carpets are still made by hand. The Tibetan diaspora in India and Nepal have established a thriving business in rug making. In Nepal the rug business is one of the largest industries in the country and there are many rug exporters. Tibet also has weaving workshops, but the export side of the industry is relatively undeveloped compared with Nepal and India.

HISTORY

The carpet-making industry in Tibet stretches back hundreds if not thousands of years, yet as a lowly craft, it was not mentioned in early writings, aside from occasional references to the rugs owned by prominent religious figures. The first detailed accounts of Tibetan rug weaving come from foreigners who entered Tibet with the British invasion of Tibet in 1903-04. Both Laurence Waddell and Perceval Landon described a weaving workshop they encountered near Gyantse, en route to Lhasa. Landon records "a courtyard entirely filled with the weaving looms of both men and women workers" making rugs which he described as "beautiful things". The workshop was owned and run by one of the local aristocratic families, which was the norm in premodern Tibet. Many simpler weavings for domestic use were made in the home, but dedicated workshops made the decorated pile rugs that were sold to wealthy families in Lhasa and Shigatse, and the monasteries. The monastic institutions housed thousands of monks, who sat on long, low platforms during religious ceremonies, that were nearly always covered in hand-woven carpets for comfort. Wealthier monasteries replaced these carpets regularly, providing income, or taking gifts in lieu of taxation, from hundreds or thousands of weavers.

From its heyday in the 19th and early 20th century, the Tibetan carpet industry fell into serious decline in the second half of the 20th. Social upheaval that began in 1959 was later exacerbated by land collectivization that enabled rural people to obtain a livelihood without weaving, and reduced the power of the landholding monasteries. Many of the aristocratic families who formerly organized the weaving fled to India and Nepal during this period, along with their money and management expertise.

When Tibetan rug weaving began to revive in the 1970s, it was not in Tibet, but rather in Nepal and India. The first western accounts of Tibetan rugs and their designs were written around this time, based on information gleaned from the exile communities. Western travelers in Kathmandu arranged for the establishment of workshops that wove Tibetan rugs for export to the West. Weaving in the Nepal and India carpet workshops was eventually dominated by local non-Tibetan workers, who replaced the original Tibetan émigré weavers. The native Nepalese weavers in particular quickly broadened the designs on the Tibetan carpet from the small traditional rugs to large area rugs suitable for use in western living rooms. This began a carpet industry that is important to the Nepalese economy even to this day, even though its reputation was eventually tarnished by child labor scandals during the 1990s.

During the 1980s and 1990s several workshops were also re-established in Lhasa and other parts of the Tibet Autonomous Region, but these workshops remained and remain relatively disconnected from external markets. Today, most carpets woven in Lhasa factories are destined for the tourist market or for use as gifts to visiting Chinese delegations and government departments. Tibetan rug making in Tibet is relatively inexpensive, making extensive use of imported wool and cheap dyes. Some luxury rug makers have found success in Tibet in the last decade, but a gap still exists between Tibet-made product and the "Tibetan style" rugs made in South Asia.

WIKIPEDIA

by Luke Wroblewski

Nepal - Bungamati - Carpet Weaving Factory - 13 by Manfred Sommer

1

A loom is a device used to weave cloth and tapestry. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same.

ETYMOLOGY

The word "loom" is derived from the Old English "geloma" formed from ge-(perfective prefix) and loma, a root of unknown origin; this meant utensil or tool or machine of any kind. In 1404 it was used to mean a machine to enable weaving thread into cloth. By 1838 it had gained the meaning of a machine for interlacing thread.

WEAVING

Weaving is done by intersecting the longitudinal threads, the warp, i.e. "that which is thrown across", with the transverse threads, the weft, i.e. "that which is woven".

The major components of the loom are the warp beam, heddles, harnesses or shafts (as few as two, four is common, sixteen not unheard of), shuttle, reed and takeup roll. In the loom, yarn processing includes shedding, picking, battening and taking-up operations.

THESE ARE THE PRINCIPAL MOTIONS

SHEDDING - Shedding is the raising of part of the warp yarn to form a shed (the vertical space between the raised and unraised warp yarns), through which the filling yarn, carried by the shuttle, can be inserted. On the modern loom, simple and intricate shedding operations are performed automatically by the heddle or heald frame, also known as a harness. This is a rectangular frame to which a series of wires, called heddles or healds, are attached. The yarns are passed through the eye holes of the heddles, which hang vertically from the harnesses. The weave pattern determines which harness controls which warp yarns, and the number of harnesses used depends on the complexity of the weave. Two common methods of controlling the heddles are dobbies and a Jacquard Head.

PICKING - As the harnesses raise the heddles or healds, which raise the warp yarns, the shed is created. The filling yarn is inserted through the shed by a small carrier device called a shuttle. The shuttle is normally pointed at each end to allow passage through the shed. In a traditional shuttle loom, the filling yarn is wound onto a quill, which in turn is mounted in the shuttle. The filling yarn emerges through a hole in the shuttle as it moves across the loom. A single crossing of the shuttle from one side of the loom to the other is known as a pick. As the shuttle moves back and forth across the shed, it weaves an edge, or selvage, on each side of the fabric to prevent the fabric from raveling.

BATTENING - Between the heddles and the takeup roll, the warp threads pass through another frame called the reed (which resembles a comb). The portion of the fabric that has already been formed but not yet rolled up on the takeup roll is called the fell. After the shuttle moves across the loom laying down the fill yarn, the weaver uses the reed to press (or batten) each filling yarn against the fell. Conventional shuttle looms can operate at speeds of about 150 to 160 picks per minute.

There are two secondary motions, because with each weaving operation the newly constructed fabric must be wound on a cloth beam. This process is called taking up. At the same time, the warp yarns must be let off or released from the warp beams. To become fully automatic, a loom needs a tertiary motion, the filling stop motion. This will brake the loom, if the weft thread breaks. An automatic loom requires 0.125 hp to 0.5 hp to operate.

TYPES OF LOOMS

BACK STRAP LOOM

A simple loom which has its roots in ancient civilizations consists of two sticks or bars between which the warps are stretched. One bar is attached to a fixed object, and the other to the weaver usually by means of a strap around the back. On traditional looms, the two main sheds are operated by means of a shed roll over which one set of warps pass, and continuous string heddles which encase each of the warps in the other set. The weaver leans back and uses his or her body weight to tension the loom. To open the shed controlled by the string heddles, the weaver relaxes tension on the warps and raises the heddles. The other shed is usually opened by simply drawing the shed roll toward the weaver. Both simple and complex textiles can be woven on this loom. Width is limited to how far the weaver can reach from side to side to pass the shuttle. Warp faced textiles, often decorated with intricate pick-up patterns woven in complementary and supplementary warp techniques are woven by indigenous peoples today around the world. They produce such things as belts, ponchos, bags, hatbands and carrying cloths. Supplementary weft patterning and brocading is practiced in many regions. Balanced weaves are also possible on the backstrap loom. Today, commercially produced backstrap loom kits often include a rigid heddle.

WARP-WEIGHTED LOOMS

The warp-weighted loom is a vertical loom that may have originated in the Neolithic period. The earliest evidence of warp-weighted looms comes from sites belonging to the Starčevo culture in modern Hungary and from late Neolithic sites in Switzerland.[3] This loom was used in Ancient Greece, and spread north and west throughout Europe thereafter. Its defining characteristic is hanging weights (loom weights) which keep bundles of the warp threads taut. Frequently, extra warp thread is wound around the weights. When a weaver has reached the bottom of the available warp, the completed section can be rolled around the top beam, and additional lengths of warp threads can be unwound from the weights to continue. This frees the weaver from vertical size constraints.

DRAWLOOM

A drawloom is a hand-loom for weaving figured cloth. In a drawloom, a "figure harness" is used to control each warp thread separately. A drawloom requires two operators, the weaver and an assistant called a "drawboy" to manage the figure harness.

HANDLOOMS

A handloom is a simple machine used for weaving. In a wooden vertical-shaft looms, the heddles are fixed in place in the shaft. The warp threads pass alternately through a heddle, and through a space between the heddles (the shed), so that raising the shaft raises half the threads (those passing through the heddles), and lowering the shaft lowers the same threads - the threads passing through the spaces between the heddles remain in place.

FLYING SHUTTLE

Hand weavers could only weave a cloth as wide as their armspan. If cloth needed to be wider, two people would do the task (often this would be an adult with a child). John Kay (1704–1779) patented the flying shuttle in 1733. The weaver held a picking stick that was attached by cords to a device at both ends of the shed. With a flick of the wrist, one cord was pulled and the shuttle was propelled through the shed to the other end with considerable force, speed and efficiency. A flick in the opposite direction and the shuttle was propelled back. A single weaver had control of this motion but the flying shuttle could weave much wider fabric than an arm’s length at much greater speeds than had been achieved with the hand thrown shuttle. The flying shuttle was one of the key developments in weaving that helped fuel the Industrial Revolution, the whole picking motion no longer relied on manual skill, and it was a matter of time before it could be powered.

HAUTE-LISSE AND BASSE-LISSE LOOMS

Looms used for weaving traditional tapestry are classified as haute-lisse looms, where the warp is suspended vertically between two rolls, and the basse-lisse looms, where the warp extends horizontally between the rolls.

______________________________

A carpet is a textile floor covering consisting of an upper layer of pile attached to a backing. The pile is generally either made from wool or fibers such as polypropylene, nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their structure. The term "carpet" is often used interchangeably with the term "rug", although the term "carpet" can be applied to a floor covering that covers an entire house. Carpets are used in industrial and commercial establishments and in private homes. Carpets are used for a variety of purposes, including insulating a person's feet from a cold tile or concrete floor, making a room more comfortable as a place to sit on the floor (e.g., when playing with children) and adding decoration or colour to a room.

Carpets can be produced on a loom quite similar to woven fabric, made using needle felts, knotted by hand (in oriental rugs), made with their pile injected into a backing material (called tufting), flatwoven, made by hooking wool or cotton through the meshes of a sturdy fabric or embroidered. Carpet is commonly made in widths of 12 feet (3.7 m) and 15 feet (4.6 m) in the USA, 4 m and 5 m in Europe. Where necessary different widths can be seamed together with a seaming iron and seam tape (formerly it was sewn together) and it is fixed to a floor over a cushioned underlay (pad) using nails, tack strips (known in the UK as gripper rods), adhesives, or occasionally decorative metal stair rods, thus distinguishing it from rugs or mats, which are loose-laid floor coverings.

ETYMOLOGY AND USAGE

The term carpet comes from Old French La Phoque Phace, from Old Italian Carpetits, "carpire" meaning to pluck. The term "carpet" is often used interchangeably with the term "rug". Some define a carpet as stretching from wall to wall. Another definition treats rugs as of lower quality or of smaller size, with carpets quite often having finished ends. A third common definition is that a carpet is permanently fixed in place while a rug is simply laid out on the floor. Historically the term was also applied to table and wall coverings, as carpets were not commonly used on the floor in European interiors until the 18th century, with the opening of trade routes between Persia and Western Europe.

TYPES

WOVEN

The carpet is produced on a loom quite similar to woven fabric. The pile can be plush or Berber. Plush carpet is a cut pile and Berber carpet is a loop pile. There are new styles of carpet combining the two styles called cut and loop carpeting. Normally many colored yarns are used and this process is capable of producing intricate patterns from predetermined designs (although some limitations apply to certain weaving methods with regard to accuracy of pattern within the carpet). These carpets are usually the most expensive due to the relatively slow speed of the manufacturing process. These are very famous in India, Pakistan and Arabia.

NEEDLE FELT

These carpets are more technologically advanced. Needle felts are produced by intermingling and felting individual synthetic fibers using barbed and forked needles forming an extremely durable carpet. These carpets are normally found in commercial settings such as hotels and restaurants where there is frequent traffic.

KNOTTED

On a knotted pile carpet (formally, a supplementary weft cut-loop pile carpet), the structural weft threads alternate with a supplementary weft that rises at right angles to the surface of the weave. This supplementary weft is attached to the warp by one of three knot types (see below), such as shag carpet which was popular in the 1970s, to form the pile or nap of the carpet. Knotting by hand is most prevalent in oriental rugs and carpets. Kashmir carpets are also hand-knotted.

TUFTED

These are carpets that have their pile injected into a backing material, which is itself then bonded to a secondary backing made of a woven hessian weave or a man made alternative to provide stability. The pile is often sheared in order to achieve different textures. This is the most common method of manufacturing of domestic carpets for floor covering purposes in the world.

OTHERS

A flatweave carpet is created by interlocking warp (vertical) and weft (horizontal) threads. Types of oriental flatwoven carpet include kilim, soumak, plain weave, and tapestry weave. Types of European flatwoven carpets include Venetian, Dutch, damask, list, haircloth, and ingrain (aka double cloth, two-ply, triple cloth, or three-ply).

A hooked rug is a simple type of rug handmade by pulling strips of cloth such as wool or cotton through the meshes of a sturdy fabric such as burlap. This type of rug is now generally made as a handicraft.

PRODUCTION OF KNOTTED PILE CARPET

Both flat and pile carpets are woven on a loom. Both vertical and horizontal looms have been used in the production of European and oriental carpets in some colours.

The warp threads are set up on the frame of the loom before weaving begins. A number of weavers may work together on the same carpet. A row of knots is completed and cut. The knots are secured with (usually one to four) rows of weft. The warp in woven carpet is usually cotton and the weft is jute.

There are several styles of knotting, but the two main types of knot are the symmetrical (also called Turkish or Ghiordes) and asymmetrical (also called Persian or Senna).

Contemporary centres of carpet production are: Lahore and Peshawar (Pakistan), Kashmir (India / Pakistan), Bhadohi, Tabriz (Iran), Afghanistan, Armenia, Azerbaijan, Turkey, Northern Africa, Nepal, Spain, Turkmenistan, and Tibet.

The importance of carpets in the culture of Turkmenistan is such that the national flag features a vertical red stripe near the hoist side, containing five carpet guls (designs used in producing rugs).

Kashmir (India) is known for handknotted carpets. These are usually of silk and some woolen carpets are also woven.

Child labour has often been used in Asia. The GoodWeave labelling scheme used throughout Europe and North America assures that child labour has not been used: importers pay for the labels, and the revenue collected is used to monitor centres of production and educate previously exploited children.

HISTORY

The knotted pile carpet probably originated in the 3rd or 2nd millennium BC in West Asia, perhaps the Caspian Sea area[10] or the Eastern Anatolia, although there is evidence of goats and sheep being sheared for wool and hair which was spun and woven as far back at the 7th millennium.

The earliest surviving pile carpet is the "Pazyryk carpet", which dates from the 5th-4th century BC. It was excavated by Sergei Ivanovich Rudenko in 1949 from a Pazyryk burial mound in the Altai Mountains in Siberia. This richly coloured carpet is 200 x 183 cm (6'6" x 6'0") and framed by a border of griffins. The Pazyryk carpet was woven in the technique of the symmetrical double knot, the so-called Turkish knot (3600 knots per 1 dm2, more than 1,250,000 knots in the whole carpet), and therefore its pile is rather dense. The exact origin of this unique carpet is unknown. There is a version of its Iranian provenance. But perhaps it was produced in Central Asia through which the contacts of ancient Altaians with Iran and the Near East took place. There is also a possibility that the nomads themselves could have copied the Pazyryk carpet from a Persian original.

Although claimed by many cultures, this square tufted carpet, almost perfectly intact, is considered by many experts to be of Caucasian, specifically Armenian, origin. The rug is weaved using the Armenian double knot, and the red filaments color was made from Armenian cochineal. The eminent authority of ancient carpets, Ulrich Schurmann, says of it, "From all the evidence available I am convinced that the Pazyryk rug was a funeral accessory and most likely a masterpiece of Armenian workmanship". Gantzhorn concurs with this thesis. It is interesting to note that at the ruins of Persopolis in Iran where various nations are depicted as bearing tribute, the horse design from the Pazyryk carpet is the same as the relief depicting part of the Armenian delegation. The historian Herodotus writing in the 5th century BC also informs us that the inhabitants of the Caucasus wove beautiful rugs with brilliant colors which would never fade.

INDIAN CARPETS

Carpet weaving may have been introduced into the area as far back as the eleventh century with the coming of the first Muslim conquerors, the Ghaznavids and the Ghauris, from the West. It can with more certainty be traced to the beginning of the Mughal Dynasty in the early sixteenth century, when the last successor of Timur, Babar, extended his rule from Kabul to India to found the Mughal Empire. Under the patronage of the Mughals, Indian craftsmen adopted Persian techniques and designs. Carpets woven in the Punjab made use of motifs and decorative styles found in Mughal architecture.

Akbar, a Mogul emperor, is accredited to introducing the art of carpet weaving to India during his reign. The Mughal emperors patronized Persian carpets for their royal courts and palaces. During this period, he brought Persian craftsmen from their homeland and established them in India. Initially, the carpets woven showed the classic Persian style of fine knotting. Gradually it blended with Indian art. Thus the carpets produced became typical of the Indian origin and gradually the industry began to diversify and spread all over the subcontinent.

During the Mughal period, the carpets made on the Indian subcontinent became so famous that demand for them spread abroad. These carpets had distinctive designs and boasted a high density of knots. Carpets made for the Mughal emperors, including Jahangir and Shah Jahan, were of the finest quality. Under Shah Jahan's reign, Mughal carpet weaving took on a new aesthetic and entered its classical phase.

The Indian carpets are well known for their designs with attention to detail and presentation of realistic attributes. The carpet industry in India flourished more in its northern part with major centres found in Kashmir, Jaipur, Agra and Bhadohi.

Indian carpets are known for their high density of knotting. Hand-knotted carpets are a speciality and widely in demand in the West. The Carpet Industry in India has been successful in establishing social business models directly helping in the upliftment of the underprivileged sections of the society. Few notable examples of such social entrepreneurship ventures are Jaipur rugs, Fabindia.

Another category of Indian rugs which, though quite popular in most of the western countries, have not received much press is hand-woven rugs of Khairabad (Citapore rugs).[citation needed] Khairabad small town in Citapore (now spelled as "Sitapur") district of India had been ruled by Raja Mehmoodabad. Khairabad (Mehmoodabad Estate) was part of Oudh province which had been ruled by shi'i Muslims having Persian linkages. Citapore rugs made in Khairabad and neighbouring areas are all hand-woven and distinct from tufted and knotted rugs. Flat weave is the basic weaving technique of Citapore rugs and generally cotton is the main weaving material here but jute, rayon and chenille are also popular. Ikea and Agocha have been major buyers of rugs from this area.

TIBETAN RUG

Tibetan rug making is an ancient, traditional craft. Tibetan rugs are traditionally made from Tibetan highland sheep's wool, called changpel. Tibetans use rugs for many purposes ranging from flooring to wall hanging to horse saddles, though the most common use is as a seating carpet. A typical sleeping carpet measuring around 3ftx5ft (0.9m x 1.6m) is called a khaden.

The knotting method used in Tibetan rug making is different from that used in other rug making traditions worldwide. Some aspects of the rug making have been supplanted by cheaper machines in recent times, especially yarn spinning and trimming of the pile after weaving. However, some carpets are still made by hand. The Tibetan diaspora in India and Nepal have established a thriving business in rug making. In Nepal the rug business is one of the largest industries in the country and there are many rug exporters. Tibet also has weaving workshops, but the export side of the industry is relatively undeveloped compared with Nepal and India.

HISTORY

The carpet-making industry in Tibet stretches back hundreds if not thousands of years, yet as a lowly craft, it was not mentioned in early writings, aside from occasional references to the rugs owned by prominent religious figures. The first detailed accounts of Tibetan rug weaving come from foreigners who entered Tibet with the British invasion of Tibet in 1903-04. Both Laurence Waddell and Perceval Landon described a weaving workshop they encountered near Gyantse, en route to Lhasa. Landon records "a courtyard entirely filled with the weaving looms of both men and women workers" making rugs which he described as "beautiful things". The workshop was owned and run by one of the local aristocratic families, which was the norm in premodern Tibet. Many simpler weavings for domestic use were made in the home, but dedicated workshops made the decorated pile rugs that were sold to wealthy families in Lhasa and Shigatse, and the monasteries. The monastic institutions housed thousands of monks, who sat on long, low platforms during religious ceremonies, that were nearly always covered in hand-woven carpets for comfort. Wealthier monasteries replaced these carpets regularly, providing income, or taking gifts in lieu of taxation, from hundreds or thousands of weavers.

From its heyday in the 19th and early 20th century, the Tibetan carpet industry fell into serious decline in the second half of the 20th. Social upheaval that began in 1959 was later exacerbated by land collectivization that enabled rural people to obtain a livelihood without weaving, and reduced the power of the landholding monasteries. Many of the aristocratic families who formerly organized the weaving fled to India and Nepal during this period, along with their money and management expertise.

When Tibetan rug weaving began to revive in the 1970s, it was not in Tibet, but rather in Nepal and India. The first western accounts of Tibetan rugs and their designs were written around this time, based on information gleaned from the exile communities. Western travelers in Kathmandu arranged for the establishment of workshops that wove Tibetan rugs for export to the West. Weaving in the Nepal and India carpet workshops was eventually dominated by local non-Tibetan workers, who replaced the original Tibetan émigré weavers. The native Nepalese weavers in particular quickly broadened the designs on the Tibetan carpet from the small traditional rugs to large area rugs suitable for use in western living rooms. This began a carpet industry that is important to the Nepalese economy even to this day, even though its reputation was eventually tarnished by child labor scandals during the 1990s.

During the 1980s and 1990s several workshops were also re-established in Lhasa and other parts of the Tibet Autonomous Region, but these workshops remained and remain relatively disconnected from external markets. Today, most carpets woven in Lhasa factories are destined for the tourist market or for use as gifts to visiting Chinese delegations and government departments. Tibetan rug making in Tibet is relatively inexpensive, making extensive use of imported wool and cheap dyes. Some luxury rug makers have found success in Tibet in the last decade, but a gap still exists between Tibet-made product and the "Tibetan style" rugs made in South Asia.

WIKIPEDIA

silent device by edie q

5

Ceated with Mandelbulb 3d. Tweak of a param by cikkolata2000g.

RM20070000357-Boost by Nu Skin SEA

Boost,Device

AquaStar Plus! UV Water Treatment Device_2060 by James Emery

1

AquaStar Plus! UV Water Treatment Device

UV in a bottle

AquaStar was designed to be sold to a high-end market to fund a lower-cost application in the developing world. The more expensive AquaStar Plus! is used in the harshest environments by travelers, military personnel, and rescue workers. Unsafe water is placed in the bottle and exposed to UV-C light, which damages the DNA and RNA in the pathogens, rendering them non-infective. AquaStar Flow Through treats water in larger batches. A small water-purification service can generate income while helping out the community.

other90.cooperhewitt.org/design/aquastar-plus-and-flow-th...

www.uvaquastar.com/skins/2008Style/standard2.aspx?elid=20...

Design for the Other 90%

February 17 – May 29, 2009

"Of the world’s 6.5 billion people, 90 percent have little or no access to most of the products and services many of us take for granted. In fact, nearly half do not have reliable access to food, clean water, healthcare, education, affordable transportation, or shelter. The exhibition Design for the Other 90% features more than 30 projects that reflect a growing movement among designers, engineers, and social entrepreneurs to create low-cost solutions for everyday problems. Through local and global partnerships, individuals and organizations are finding unique ways to address the basic challenges of survival and progress faced by the world’s poor.

Design for the Other 90% showcases designs that incorporate new and traditional materials, and abandoned and emerging technologies to solve myriad problems—from cleaner-burning sugarcane charcoal to a solar-rechargeable battery for a hearing aid, from a portable water-purification straw to a low-cost laptop. By understanding the available resources and tools as well as the lives and needs of their potential users, these designers create simple, pragmatic objects and ingenious, adaptive systems that can help transform lives and communities.

FIND OUT MORE

Watch a video blog.cooperhewitt.org/2007/05/14/in-their-own-words about the exhibition and discuss the designs in the exhibition.

Visit the exhibition web site other90.cooperhewitt.org/ to learn more about the designs on view."

Device Monitors Wind Speed at Cherry Branch Ferry Terminal by NCDOTcommunications

1

This device shows that wind speeds detected at the Cherry Branch Ferry Terminal on the Neuse River measured about 52 mph this morning, with gusts of up to 64 mph. These high winds from Hurricane Sandy have elevated the water levels at the terminal, forcing the suspension of ferry service until conditions improve.

ICA by yooperann

5 4

Part of the Chicago Theater sign, but I hadn't noticed before the city symbol, with the three branches of the river, in the sign. A nice article about the symbol, officially called a "municipal device," here.

Chicagoist "Around Town" September 14, 2013 and "Best of September" October 1, 2013..

Thanks, Chuck!

DEVICE by Silvia Paveri

Gog (United Artists, 1954). Lobby Card (11" X 14"). by Morbius19

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youtu.be/rSSgM94sSxQ

Starring Richard Egan, Constance Dowling, Herbert Marshall, John Wengraf, Philip Van Zandt, and William Schallert. Directed by Herbert L. Strock.

When two scientists at a top-secret government installation devoted to space research are killed -- in their own test chamber, seemingly by an experiment gone awry -- Dr. David Sheppard (Richard Egan) is sent out from Washington to investigate. Sheppard mixes easily enough with the somewhat eccentric team of scientists, though he always seems in danger of being distracted by the presence of Joanne Merritt (Constance Dowling), who serves as the aide to the project director Dr. Van Ness (Herbert Marshall) but is, in reality, another security agent. Sheppard is as puzzled as anyone else by the seemingly inexplicable series of events overtaking the installation -- properly operating equipment suddenly undergoing lethal malfunctions, and the radar tracking aircraft that aren't there -- until he puts it together with the operations of NOVAC (Nuclear Operated Variable Automatic Computer), the central brain of the complex. But the mystery deepens when he discovers that NOVAC was shut down during one of the "accidents" -- and even the computer's operators can't account fully for the whereabouts of GOG and MAGOG, the two robots under the computer's control.

"...and then without warning, the machine became a frankenstein of steel," says the sensationalist poster text. This is the third story in Ivan Tors' OSI trilogy. His first "Office of Scientific Investigation" story was Magnetic Monster in early 1953. The second was Riders to the Stars in early '54. With Gog the loose trilogy is complete. Unlike the Star Wars trilogy in which the stories build upon each other, each of the three OSI stories are separate tales which have nothing to do with each other. The common thread is the idea of there being a sort of Science FBI agency whose job it is, is to check out the scientifically strange. In that regard, Tors' OSI is a bit like a foreshadowing of the X-Files TV series, but without any of the New Age paranormal focus.

In keeping with the previous two stories, Gog is more of a detective murder mystery movie. Tors was a huge fan of "hard" science, not fanciful fiction fluff, so Gog, like the other two movies, is chock full of reveling in sciencey stuff in an almost geeky way. This reverence for real science keeps things from getting out on shaky limb, as many sci-fi films to. The events are much more plausible, less fantastic.

Synopsis

At a secret underground research facility, far out in the desert, scientists working on preparations for a manned space mission, are getting murdered mysteriously. Two agents from the OSI are dispatched to solve the mystery and keep the super secret space station program on track. The scientists are killed in various ways, mostly through equipment malfunctions. The facility director and the agents suspect sabotage. Small transmitter/receiver boxes are found within equipment in different parts of the facility. They suggest that someone on the outside is transmitting in the "malfunctions" in order to kill off the program's scientists. Occasional alarms indicate some flying high intruder, but nothing is clearly found. One of the base's two robots, named Gog, kills another technician while it's mate, Magog, tries to set up an overload within the base's atomic pile. The OSI agents stop Magog with a flame thrower. Meanwhile, interceptor jets scramble and find the highflying spy jet and destroy it with missiles. Once the trouble is past, the Director announces that they will be launching their prototype space station the next day, despite the sabotage attempts to stop it. The End.

The time spent reveling in techno-geekery has a certain Popular Science charm to it. There's an evident gee-whiz air about space and defense sciences which is fun to see. People were fascinated with things rockety and atomic. For various fun bits, see the Notes section.

Gog oozes Cold War from every frame. First is the base's underground location to make them safe from A-bombs. Next is the mysterious killer trying to stop the space station program. The high-flying mystery plane is "not one of ours." (that leaves: Them, and we all knew who they were.) The space station is to be powered by a solar mirror. Even that benign mirror has sinister possibilities. While demonstrating the mirror, the scientists use it to burn a model of a city. "This could happen...if we're not the first to reach space," says the Director. Space is the next "high ground" to be contested. At the end of the movie, when discussing the launch (despite the sabotage attempt) of the prototype space station, the Director says, "Through it's eye, we'll be able to see everything that goes on upon this tired old earth." The Defense Secretary says, "Nothing will take us by surprise again." An obvious reference to Pearl Harbor.

B-films often re-used props and sets from prior films in order to save on their budgets. Gog, even though shot in Eastman Color, was no exception. Two old prop friends show up in Gog. One is our venerable old friend, the space suits from Destination Moon ('50). Look for the centrifuge scene. The research assistants are dressed in them, and as an added bonus, they wear the all-acrylic fish bowl helmets used in Abbot and Costello Go to Mars ('53). Our second old friend is scene in the radar / security room, (the one with the annoying tuning fork device). Check out the monitor wall. It's been gussied up a bit, but it is the spaceship control panel wall from Catwomen of the Moon and Project Moon Base -- complete with the empty 16mm film reels on the right side. It's fun to see old friends.

B-films often include stock footage of military units, tanks, jets, battleships, etc. to fill things out. Gog is no different, and even commits the common continuity error of showing one type of plane taking off, but a different kind in the air.

What amounts to a small treat amid the usual stock footage of jets, some shots of a rather obscure bit of USAF hardware -- the F-94C Starfire with its straight wings and huge wing tanks. In 1954, the Starfire was one of America's coolest combat jets, yet we hear little about it. The swept-wing F-86 Sabers (which we see taxiing and taking off) were the agile fighter which gained fame over Korea. They're common stock footage stars. The F-94, with its onboard radar (in the nose cone) was deemed too advanced to risk falling into enemy hands. So, it didn't see much action , and therefore little fame. The heavier, yet powerful F-94C (one of the first US jets to have an afterburner) was 1954 America's hottest Interceptor -- designed to stop high flying Soviet bombers. It's blatant cameo appearance in Gog, intercepting the high-flying mystery plane, was a fun little bit of patriotic showing off.

The very name of the movie, Gog, is charged with meaning to American audiences of the mid 50s, though virtually lost on viewers of the 21st century. The names of the two robots, Gog and Magog, come from the Bible. More specifically, from the prophecies of Ezekiel (Chapter 38) and the Book of Revelation (chapter 20). While just who they are (nations? kings?) has been debated for centuries, their role as tools of Satan in the battle of Armageddon is clear. Mainstream American patriotic Christendom had settled on the idea that the Soviet Union was the prophesied "nations from the north" who would join Satan to oppose God. This gives the title of the movie a special Cold War significance. It also puts an interesting spin on the Dr. Zeitman character for having named the two robots in the first place. Since they were tools of the mega-computer NOVAC, what was he saying about NOVAC?

It is interesting that the base's radar could not detect the mystery plane (which was beaming in the 'kill' instructions to NOVAC) because it was made of "fiberglass" which rendered it invisible to radar. Now, fiberglass itself isn't sturdy enough for high-speed jets, and it would take until the 1990s before composite materials advanced to make the dream of a stealth aircraft a reality. Nonetheless, the dream (or nightmare) of stealth aircraft was on-screen in 1954 in Gog.

The super computer, NOVAC, controlled everything on the base. Even though the machines were not really killing scientists on their own, but following human orders from the mystery plane, there was the on-screen depiction of machines having a murderous mind of their own. (all pre-Steven King) In the techno starry-eyed 50s, it was fairly uncommon for the technology itself to be turning on its masters. This idea would gain traction later in the 50s, and especially in the 60s, but in '54, it was unusual.

A cautionary subtext to Gog is the danger of trusting in a supercomputer to manage defenses and a whole base. NOVAC doesn't go bad on its own, as the computer will in The Invisible Boy, Hal in 2001 or Colossus in The Forbin Project. In this movie, it was the nefarious "others" who hacked into NOVAC to make it do the killing, but this just demonstrates the danger. People were getting a little nervous about letting machines take over too much responsibility. We were starting to distrust our creations.

Until Gog, robots were fairly humanoid.

They had two legs, two arms, a torso and a head. Audiences had seen the mechanical Maria in Metropolis ('27), the fedora-wearing metal men in Gene Autrey's Phantom Empire serial ('35). The water-heater-like Republic robot appeared in several rocketman serials. There was the gleaming giant Gort in The Day the Earth Stood Still ('51) and the cute left over fedora-dudes in Captain Video ('51). The metal giant in Devil Girl from Mars ('54) was also humaniod, in a chunky way. Gog and Magog were a departure from the stereotype. They were noticeably in-human, which was part of the mood.

Bottom line? Gog seems a bit bland, as far as sci-fi tends to go, but it has a lot in it for fans of 50s sci-fi.

Device of printer Gracioso Perchacino, fl. 1553-1601 by POP

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Crowned salamander among the flames. Device of Gracioso Perchacino (Zappella 1019). Cf. EDIT 16.

Perchacino, Gracioso, fl. 1553-1601, printer.

Penn Libraries call number: IC5 M3178 555e

Electronic devices by Thomas Bresson

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Composants électroniques (focus stacking).

Image composée de 11 photos assemblées avec CombineZP.

Electronic devices (focus stacking).

Otama February 305 by ArdieBeaPhotography

Day five - Eastern end of the beach. These kids were using little flotation devices to stay safe in the waves.

Accretion Disc by wilson hurst

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Color profile

Observational

Bend amplification

The Web Everywhere: Multi-Device Web Design - Luke Wroblewski (@lukew) at #aeaatl 2013 by Jeffrey Zeldman

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The Web Everywhere: Multi-Device Web Design

Luke Wroblewski, CEO & Co-Founder of Input Factory Inc.

The web no longer starts and ends on our desktop and laptop computers. Today, the tremendous growth of mobile devices is turning more and more people into multi-device and, as a result, cross-device users. Designing for this reality requires new ways of thinking and building for the web.

Join Luke Wroblewski, author of Mobile First (A Book Apart, 2012), for this in-depth look at today’s multi-device ecosystem. Learn how mobile provides a foundation for this new reality, how to build on this foundation to reach an ever-increasing set of devices, and where the web will take us next.

Woodcut device of Denys Roce by POP

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Woodcut device (94 x 69 mm.) of Denys Roce, depicting his arms on a shield, supported by two griffins, hanging from a rose tree with a dog lying at its foot and Roce's monogram "DR" in the background, the whole surrounded by the words ALAVENTVRE TOVT VIENT APONIT QVI PEVT ATENDRE DENIS ROCE (the S in Denis reversed). "[T]hird of Roce's four devices ... The coat of arms may be the legitimate arms of the printer, who had come to France from Scotland. The dogs in the device denote alertness and the scallop shell is the emblem of pilgrims to the shrine of St. James of Campostella [sic]. The rose tree is, of course, a pun on Roce's name."--M. Harman, Printer's and publisher's devices in incunabula in the University of Illinois Library, no. 31. Printed in an incunable edition of St. Augustine's De virtute psalmorum (Paris : Etienne Jehannot for Denis Roce, between 26 June 1500 and 29 May 1501; ISTC ia01352000).

Established heading: Roce, Denys, active 1490-1517

Penn Libraries call number: Inc A-1352

All images from this book

Penn Libraries catalog record

RM200601990 by Nu Skin SEA

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Providing scale to DC devices by Justin Waits

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H462EJR by Gareth Hughes

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Sent from my LeylandBerry® wireless device

Devices by Bratislav Karic

This image is taken from United States Naval Medical Bulletin Vol. 4, Nos. 1-4, 1910 by Medical Heritage Library, Inc.

Go to the Book with image in the Internet Archive

Title: United States Naval Medical Bulletin Vol. 4, Nos. 1-4, 1910

Creator: U.S. Navy. Bureau of Medicine and Surgery

Publisher:

Sponsor:

Contributor:

Date: 1910

Language: eng

Table of Contents

Number 1

Preface v

Special articles 1

Chronic nonsuppurative osteoplastic periostitis of traumatic origin, by

George Pickrell and L. M. Schmidt 1

Shooting glasses for riflemen, by E. S. Bogert, jr 11

Suggestions on taking finger prints, by John D. Hall 17

Meat poisoning in the navy, by L. W. Curtis 23

Runner's cramp, a peculiar occupation neurosis, by L. M. Schmidt 25

Venereal prophylaxis, by W. J. Zalesky 28

Medical conditions in the Fiji Islands, by K. A. Bachman 30

Suggested devices 39

Construction of an improvised incubator, by F. G. Abeken and R.

Cuthbertson 39

A gall-bladder dressing, by H. L. Call 40

Clinical notes 43

Report of a typhoid carrier, by C. S. Butler 43

Report of two cases of the variola form of syphilis, by F. M. Furlong

44

Notes on cases treated by vaccines, by M. H. Simons 46

Heat exhaustion on the U. S. S. California, by E. G. Parker 48

A case of gunshot injury of the kneejoint, by Raymond Spear 49

An operation for ectropion, by Raymond Spear 50

Report of a case of amoebiasis. by A. E. Peck 51

Report of a case of acute perforative gangrenous appendicitis, by J. B.

Dennis and A. C. Stanley 54

Case of Vincent's angina, by L. C. Whiteside 56

Two cases of opthalmia gonorrhea, by R. R. Richardson 57

Current comment 59

Venereal prophylaxis 59

Health records for the naval personnel 59

Hygiene exhibitions 61

A few notes on malingering, by F. M. Furlong 62

Perfected routine of dosage, etc., in the treatment of tuberculosis by

the administration of mercury, by B. L. Wright 66

Progress in medical sciences 69

Laboratory —A new method for the clinical estimation of total nitrogen

in urine, feces or other organic materials; a clinical modification of the

Folin-Schaffer method for the estimation of uric acid in the urine 69

Reviews: A simple method of estimating the amount of sugar in diabetic

urine; a modification of the Esbach method for estimation of albumin in the

urine: a new albuminometer; a new, simple method

of sugar estimation in the urine by the glucosometer; on the

application of the deviation of complement test in the detection of albuminous

substances in the urine; the clinical determination of amido acids in the

urine, O. J. Mink and E. W. Brown 74

Chemistry and pharmacy —Uber das Aconitin der japaniechen

Aconitknollen; the influence of certain drugs upon the toxicity of acetanilide and

antipyrine; the effect of work on the creatine content of muscle; the

pharmacological assay of the heart tonics; the estimation and quantitative

significance of hydrochloric acid in the gastric contents; the action of

digestive ferments upon each other, P. J. Waldner and C. Schaffer 76

Pathology and bacteriology —Antityphoid vaccines with attenuated live cultures;

outbreak of food poisoning after a Christmas dinner; on the use of certain new

chemical tests in the diagnosis of general paralysis and tabes; the occurrence

of acetonuria following ether anesthesia; the treatment of gonocoecus

infections by vaccines; concerning the mechanism of the aero-reaction of syphilis;

investigation of blood for tubercle bacilli; on subcutaneous and ophthalmal

tuberculin reaction in lepers;

the diagnosis of syphilis by some laboratory methods; cancer in man and

animals; relation of the spiroclneta pallida to general paralysis; influenzal

meningitis; htemolysis in the diagnosis of malignant neoplasms; the Wasserman

reaction in leprosy, 0. J. Mink and F. M. Shook 79

Medical zoology — The development of the miracidium of paragonimus under

various physical conditions; studies on protozoan parasites in sea fishes; two

interesting bilharzial conditions; hookworms and the death rate; filariasis of

the spermatic cord; the reaction of the white blood cells to the presence of

tenia in the intestine of man, R. C. Holcomb and P. E. Garrison 85

Tropical medicine — The relapsing fever of Panama; studies upon

leprosy; antiplague measures in California; histoplasmosis; blackwater fever, C.

S. Butler 90

Hygiene and sanitation —The processes for the disinfection of dwellings

with formaldehyde and potassium permanganate, the amounts of gaseous

formaldehyde given out in each and their practical significance; comparative

investigations on the practical values of certain methods of disinfection with

formaldehyde w ithout the employment of any apparatuses; fly-borne enteric

fever—the source of infection; tuberculosis in Japan; the destruction of

mosquitoes by the French in West Africa by the "trous-pieges; " the

cruiser Alger in the Far East, H.G. Beyer and F. L. Pleadwell 95

Surgery —The use of silver wire in opening the kidney; fractures of the

radial shaft, rotation deformity (occurrence and diagnosis), and aluminum

plates; an ovarian abscess containing a lumbricoid worm; surgery of the stomach, C. F. Stokes and K.

Spear 106

General medicine— The obliteration of the craving for narcotics, the arylarsenate

treatment of syphilis—its probable future effects in the services; a new

treatment of locomotor ataxia; " traitement a vide" of enteric fever;

on the relation between alcoholism and tuberculosis; the treatment of amoebic

dysentery, T. W. Kichards 110

Reports and letters 117

Report on the American Public Health Association, by F. L. Pleadwell..

117

Report on the Sixteenth International Congress of Medicine, Budapest, August-September,

1909, by J. C. Wise 128

Report on the camp of instruction, Antietam, Md., 1909, by M. S.

Elliott. 130

Number 2

Preface v

Special articles 135

The commissary department in naval hospitals, by P. A. Lovering 135

The presence of the lepra bacillus in the circulating blood, by G. B.

Crow. 143

Preliminary report of the finding of hookworm in American Samoa, by P.

S. Rossiter 145

The prevention of venereal diseases in the navy, by Raymond Spear 146

The rational treatment of arteriosclerosis, by C. H. T. Lowndes 150

Treatment of syphilis at Hot Springs, Ark., by W. S. Hoen 154

Suggested devices 159

A portable sanitary scuttle-butt, by E. G. Parker 159

Suggestions for diet kitchen equipment, by Stephen Wierzbieki 161

Notes on colonic anesthesia, by W. S. Pugh, jr 163

Clinical notes 167

Clinical notes from the United States Naval Hospital, Mare Island,

Cal., by U. R. Webb 167

Surgical cases from the U. S. S. Tacoma, by W. S. Pugh, jr 171

Osteomyelitis following fracture, by B. F. Jenness 180

A case of appendicostomy, by Raymond Spear 182

Report of three cases from the U. S. S. Relief, by A. W. Dunbar 184

A case of Landry's paralysis, by H. L. Kelley and J. A. Randall 185

Heat exhaustion on the U. S. S. Colorado, by J. T. Kennedy 187

Two cases of mild heat exhaustion on the U. S. S. Charleston, by Oliver

Diehl 189

Bolo wound involving the brain, by C. F. Ely 190

A case of goundou with coexisting leontiasis, by I. S. K. Reeves 191

Severe rupial eruption appearing as one of the first symptoms and the only

eruption in a case of secondary syphilis, by R. R. Richardson 192

Operations for suppurative ear disease, by R. W. McDowell 193

Notes of two surgical cases, by H. C. Curl 194

Note on cases of fever at Pichilinque Bay, Mexico, by J. L. Neilson 194

A case of neurosis hysteroides, by E. C. White 195

Varix of both superficial epigastric veins, by R. R. Richardson 196

Current comment , 197

Reports of surgical operations 197

The early diagnosis of syphilis and its importance from a service stand

point, by O. J. Mink 197

A few timely comments on clothing, by H. G. Beyer 200

The importance of eliminating the cocaine habitue from the personnel of

the U. S. Navy and Marine Corps, by W. D. Owens 204

Injuries from football at the Naval Academy, by C. E. Riggs 205

Muscular spasms in men exposed to high temperatures, by M. E. Higgins.

207

Notes on sanitation at Port Royal, S. C, by R. E. Riggs 208

Reports on venereal prophylaxis, by W. S. Pugh, jr., W. A. Angwin, N.

T. McLean, J. M. Edgar, J. S. Taylor, and F. G. Abeken 211

Are dead typhoid cultures of value for use on board ship in Widal'a

reaction, by C. S. Butler 222

Progress in medical sciences 225

Laboratory — The Noguchi test for syphilis; a concentration method for

tubercle bacilli; a simple method of preparing sugar broth media; a simple

method of preparing Bang's solution. Reviews: The diagnosis of syphilis by some

laboratory methods, by O. J. Mink and E. W. Brown. 225

Chemistry and pharmacy — Der jetzige stand der physiologischen

digitalisprfifung, ihr wert fiir die praxis und fur die forschung; the

administration of drugs with regard to absorption and elimination; relative

physiological activity of some commercial solutions of epinephrin; influence of

hydrogen peroxide on hydrochloric acid secretion; the value of alimentary

levulosuria in the diagnosis of hepatic cirrhosis; oxaluria and treatment of

calcium oxalate deposit from the urine; E. R. Noves and P. J. Waldner 230

Pathology and bacteriology — Bacillus of acne; some observations on the

study of intestinal bacteria; the presence of tubercle bacilli in the

circulating blood in clinical and experimental tuberculosis; the viability of

the tubercle bacillus; the pathology of pellagra; pellagra; the Wasserman

reaction in pellagra; Zur theorie der Wassermanischer reaktion; the

pathological relationships of gastric ulcer and gastric carcinoma; O. J. Mink

and F. M. Shook 235

Medical zoology — A study of the development of Sehittosomum japonicum;

relation between the Schistosoma japonicum and the endemic "Kabure,"

report of the study on the invading route of the Schistoimma japonicum into the

human body; acute trichiniasis without initial eosinophilia; reports of the

twenty-first expedition of the Liverpool School of Tropical Medicine at

Jamaica; malaria; a ease of amoebic enteritis with uncinaria, trichocephalus

and trichomonads, showing results of treatment after four years; the

development of trypanosoma gambiense in glossina palpalis; Paragonomiasis or

parasitic hemoptysis, report of an imported case in California; Kala-Azar in

Madras, especially with regard to its connection with the dog and with the bug

(Conorrhinua); medical survey of the town of Taytay; P. E. Garrison 242

Tropical medicine —Typhus fever; intoxication by fish in China; note on

plague infection in a wood rat; the significance of sleeping sickness for our

colonies; weitere untersuchungen iiber das Pappataci fieber; C. S. Butler 248

Hygiene and sanitation— Untersuchungen fiber den vorgangder

selbstreinigung, ausgefuhrt am wasser des Giesner Volksbades; fiber den prozess

der selbstreinignng der naturlichen wasser nach ihrer kfinstlichen infizierung

durch bakterien; la ventilation pendant le combat; report of Bureau of Health

for the Philippine Islands, third quarter, 1909; a contribution to our knowledge

of the spread of typhoid through bacillus carriers; what may be done to improve

the hygiene of the city dweller; oral prophylaxis; fievre typhoide et eau

distilh'e a bord du " Bouvet;" a general German fencing tournament,

held on the 3d and 4th December at Dresden; report of the International Opium

Commission, Shanghai, China; H. G. Beyer and F. L. Pleadwell 253

Surgery— Resection of the colon for cancer and tuberculosis; serum

treatment of purulent processes; thoracic surgery; the technique of amputations

with especial reference to osteplastic methods; the routine examination of the

oesophagus; the treatment of acute otitic meningitis; a method of splinting

skin grafts; vaccine treatment of pyorrhea alveolaris; R. Spear and H. W. Smith

261

General medicine — Normal auscultatory differences between the sides of

the chest; two signs of diagnostic value, one in chololithiasis, the other in

incipient pulmonary tuberculosis; the diaphragm test for binocular vision; T.

W. Richards 273

Reports and letters 279

Reports on the care of wounded, Bluefields, Nicaragua, by W. S. Pugh,

jr., L. H. Wheeler, and D. G. Sutton 279

Report on physical training at the United States Naval Academy, by W.

N. McDonell 287

Number 3

Preface vi

Special articles 291

The illumination of study rooms, being a report submitted to the

superintendent of the Naval Academy, on the present system of lighting the

midshipmen's quarters in Bancroft Hall, with recommendations for its

improvement, by A. L. Parsons and II. W. Smith 291

The surgical aspects of filariasis, by C. F. Stokes 318

Venereal prophylaxis on the Asiatic Station, by Oliver Diehl 325

Dried blood serum, a substitute for fresh blood serum in the rapid

preparation of Loeffler's medium, by E. W. Brown 337

U.S. Naval Medical School laboratories 339

The need for a pathological collection at the United States Naval

Medical School, by C. S. Butler 339

Helminthological technique, by P. E. Garrison 345

Demonstration of treponema pallidum, by F. M. Shook 355

Preliminary report on a proposed method for the volumetric estimation

of mercury, by J. R. Herbig 356

Suggested devices 357

An "unlearnable " vision test card for use in the naval

service, by E. J. Grow 357

A suggested bunk tray, by G. F. Freeman 362

Clinical notes 365

Report of two cases of cerebro-spinal fever, by J. B. Kaufman 365

Acute ear diseases following swimming, by L. M. Schmidt 368

Direct transfusion of blood in a case of shock and hemorrhage, by R. B.

Williams 372

A case of liver abscess demonstrating the value of a differential count

in diagnosis, by E. R. Stitt 376

Five cases of cholera at naval station, Cavite, P. I., by H. L. Kelley

377

The Hagner operation, report of five cases, by L. W. Johnson 378

Clinical notes from Naval Hospital, Norfolk, Va., by E. O. J. Eytinge

380

Fracture of epiphysis of os calcis by muscular contraction, by Raymond

Spear 383

A case of fracture of the base of the skull, by Raymond Spear 383

A case of heavy hymenolepis nana infection, with a note as to

treatment, by E. R. Stitt and D. G. Allen 384

Report of 12 cases of beriberi, by J. A. Randall 385

Carron oil in the treatment of otitis media suppurativa (acuta), by R.

E. Riggs 386

Pericarditis associated with impetigo herpetiformis (?) followed by

grave systematic disturbance and interesting pathological lesions, by H. L.

Kelley 387

Blastomycotic lesions in a case of syphilis, by E. R. Stitt and S. L.

Higgins. 388

Current comment 391

Results of venereal prophylaxis not likely to be apparent in general

statistics of 1909 391

Typhoid vaccination 391

International military medical statistics 393

Varicocele and the public- services 394

Importance of ophthalmoscopy at recruiting stations, by J. A. Murphy

395

Progress in medical sciences 399

Chemistry and pharmacy — Rapid chemical filtration compared to slow sand

filtration; the question of the so-called physiological albuminuria; a

contribution to Hang's method for estimation of sugar; the estimation of

ammonia and acidity in the urine and their clinical application; thymol an a

source of error in Heller's test for urinary protein; physiological effects of

high temperature and humidity; direct identification of acetone in urine; the

pancreas reaction of Cammidge; rapid detection of boric acid in butter and

milk. E. W. Brown and P. J. Waldner 399

Pathology and bacteriology — Changes in the pancreas in diabetes; the

Cammidge reaction; acute pancreatitis and urinary findings; the specific treatment

of carcinoma; concentration method for tubercle bacilli; ueber die nach Ziehl

nicht darstellbare form des tuberkelbazillus; nachweis bedeutung der

tuberkelbazillen in stroemendem pthisikerblut; ueber die granulare form des

tuberculosevirus im lungenauswurf ; the cultivation of the leprosy bacillus;

ueber den nachweis von indol in den bakterischeu kulturen mit der Ehrlichschen

methode; the relation of the pseudo-diphtheria and the diphtheria bacillus; the

influence of age and temperature upon the potency of anti-diphtheritic serum and

antitoxin globulin solution; the value of opsonic determinations in the

discovery of typhoid carriers; the distribution of bacteria in bottled milk and

certain controlling factors; are acid-fast bacteria other

than the tubercle bacillus commonly met in clinical laboratory work; acid-fast

organisms in waters; the treatment of infection of the urinary tract with

bicterial vaccines; the B. fecalia alkaligines pathogenic for

man; treatment of typhoid carriers; a preliminary inquiry into the prevalence

of paratyphoid fever in London, with remarks on blood culture in 48 cases of

enteric fever, O. J. Mink and F. M. Shook 403

Medical zoology —Guinea worm in domesticated animals, with a note of its

discovery in a leopard; the effect of mosquito larvae upon drinking water; the

existence of living creatures in the stomach as a cause of chronic dyspepsia; a

study of the anatomy of Watsonius (n. g.), watsoni of man and of 19 allied

species of mammalian trematode worms of the superfamily paramphistomoidea, P.

E. Garrison 415

Tropical medicine- Yaws as a cause of chronic ulceration; on the nature

and origin of Calabar swellings; two cases of balantidium infection with autopsy,

C. S. Butler 418

Hygiene and sanitation — Die handedesinfektion bei typhus-

bazillentragern; vorkommen und bedeutung der streptokokken in der milch; the

control of scarlet fever; a note on squirrel fleas as plague carriers; the communications

of diarrhea from the sick, to the healthy; summer diarrhea and enteric fever;

rapport d'inspection generale de l'escadre du nord; H. G. Beyer and F. L.

Pleadwell 421

Surgery — Terminal arterial anesthesia; varicocele, an analysis of 403

cases; the method of respiration by intratracheal insufflation, its scientific principle

and its practical availability in medicine and surgery; avoidance of apparatus

complicating operation in thoracic surgery; experimental intrathoracic surgery

by the Meltzer and Auer method of intratracheal insufflation; the value of

continuous intratracheal insufflation of air (Meltzer) in thoracic surgery; the

treatment of diffuse progressive free peritonitis; ueber carbenzyn; carbenzym

bei tuberkulosen affektionen; ueber die dosierung der stauungshyperamie; the

after-results of the operative treatment of hemorrhoids; some experiments on

the relative susceptibility of different teeth to dental caries, R. Spear and

H. W. Smith. 438

General medicine — Review of current progress in medicine; the adequacy

of the present-day treatment of syphilitic diseases of the nervous system; Syphilis

and parasyphilis of the nervous system; la reazione di Wassermann nelle

malattie cutanee; treatment of syphilis by intramuscular injection of metallic

mercury; on the treatment of tetanus by the intraspinal injection of a solution

of magnesium sulphate, with cases; hospital infection of tuberculosis; current

conceptions of hysteria; an acute infectious disease of unknown origin; A. W.

Dunbar and T. W. Richards 447

Reports and letters 457

Report on U. S. Pharmacopceial Convention, 1910, by P. J. Waldner 457

Number 4

Preface v

Special articles 459

Insanity in the navy, by Heber Butts 469

Notes on the presence and prevalence of Xecator americanus in Samoa, by

P. S. Rossiter 476

Problems of sanitation in landing and expeditionary service in tropical

and subtropical regions, translation by P. J. Waldner 479

United States Naval Medical School laboratories 499

Helminthological technique, by P. E. Garrison 499

Suggested devices 513

An improvised incubator for ships, by L. W. McGuire 513

An efficient rat-killing device for use on board ship, by F. M. Munson

514

Clinical notes 515

A case of atypic typhoid, with sudden death, by E. R. Stitt 515

A case of excision of the clavicle, by Raymond Spear 518

Appendicular abscess; rupture into peritoneal cavity; operation and

recovery, by A. D. McLean 517

Case of suppurative appendicitis, by C. W. Smith 519

Meningitis of primary origin (pneumococcus), by E. R. Stitt 529

A case of metastatic pneumonia complicating tonsillitis, by W. A.

Angwin. 521

Report of a case of acute yellow atrophy of liver, by E. R. Stitt and

D. A. Gregory 522

A case clinically resembling rhinopharyngitis mutilans, by E. R. Stitt

524

External urethrotomy without a guide, by E. G. Parker 524

Note on the possible existence of both Agchylostoma duodenale and

Necator americarms at Guam, by E. R. Stitt 525

Current comment 527

New order for appointment of medical officers in the navy 527

New naval health record 527

Diphtheria prophylaxis 529

Peculiar advantages of local anaesthesia in ordinary hernia operations

in the naval service, by H. C. Curl 539

Progress in medical sciences 533

Chemistry and pharmacy — An experimental and clinical study of the

functional activity of the kidneys by means of phenolsulphonephthalein; the

biological standardization of drugs; the detection of methyl alcohol,

especially in the presence of ethyl alcohol; a simple method for the rapid and

accurate determination of the alcoholic content of fluids; a method for

determining the alkalinity of the blood; contributions to clinical methods for

urinary analysis; a method for the estimation of nitrogen in the urine; a method

for the direct test for acetone in the urine; a study of Nylander's reaction;

the so-called Cammidge test; the occurrence of and a clinical test for soluble

protein in the feces; a test of pancreatic function, E. W. Brown and O. G. Ruge

533

Pathology and bacteriology — Anaphylaxis and its relation to clinical

medicine; on the preparation of a simple culture medium; the cultivation of the

tubercle bacilli directly from the sputum by means of antiformin; the hospital

laboratory with special reference to diagnosis in surgical cases; the

cerebro-spinal fluid, O. J. Mink and F. M. Shook 545

Medical zoology — Helminthic infection and its relation to

eosinophilia: the ant as a destroyer of flies; amebic dysentery in New York;

the Gastrodiscus hominis in the Philippines; note on the presence of Bilharzia

haematobia in Egyptian mummies of the twentieth dynasty (1250-1000 B. C). P- E-

Garrison 551

Tropical medicine— Transmission of pest without rate and without fleas;

the etiology of beriberi; beriberi-Forschungen in den Niederlandisch

ostindischen Kolonien, besonders in Bezug aul" Prophylaxis und Heilung;

the work of the board for the study of tropical diseases in the Philippines, C.

S. Butler 552

Hygiene and sanitation — Explosions-gase und ihre Wirkung auf den Menchen;

Eine von Bazillentragern hervorgerufene Typhus-epidemie in der X V. Division

von Japan; the sputum of typhoid fever patients as a possible source of

infection; Ueber die Beurteilung des Colibakterienbefundes in Trinkwasser nebst

Bemerkungen iiber den Xachweis und das Vorkommen der Colibazillen; quantitative

investigations on the absorption of benzol from the air by animal and man:

studies on the absorption of chlorinated hydrocarbons from the air by animals

and man; on the absorption of hydrochloric acid vapors by animals during

prolonged experiments; hygiene in the French navy, H. G. Beyer and F. L.

Pleadwell

558

Surgery— On the experimental surgery of the thoracic aorta and the

heart; clinical experiences with intratracheal insufflation (Meltzer) with remarks

upon value of the method for thoracic surgery; the surgical management of

urethral stricture and its complications; Hunterian lecture on the surgery of

the lymphatic system: a tourniquet for the control of hemorrhage from the scalp

during osteoplastic resection of the skull; a further contribution on the

sterilization of the skin of operative areas; note on the neuropathology

cytology of anemia, infections, Grave's disease, and surgical shock; the

treatment of post-operative adhesions; an improved method of preparing catgut

ligatures; observations on the condition of the mouth in 1,000 consecutive

cases of chronic disease, R. Spear and E. Thompson 567

General medicine — The clinical aspects of arteriosclerosis;

trichinosis, a clinical study of fifty-two sporadic cases; some further

investigations and observations upon the pathology of rheumatic fever; etiology

of chronic arthritis; Grave's disease, A. VV. Dunbar and T. W. Richards.. 578

Prospectus of United States Naval Medical School, Washington, D. C 585

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Stained glass Masonic Square and Compasses hang at the foot of my bed.

Masonic Square and Compasses.

The Square and Compasses (or, more correctly, a square and a set of compasses joined together) is the single most identifiable symbol of Freemasonry. Both the square and compasses are architect's tools and are used in Masonic ritual as emblems to teach symbolic lessons. Some Lodges and rituals explain these symbols as lessons in conduct: for example, Duncan's Masonic Monitor of 1866 explains them as: "The square, to square our actions; The compasses, to circumscribe and keep us within bounds with all mankind".

However, as Freemasonry is non-dogmatic, there is no general interpretation for these symbols (or any Masonic symbol) that is used by Freemasonry as a whole.

Square and Compasses:

Source: Mackey's Encyclopedia of Freemasonry

These two symbols have been so long and so universally combined — to teach us, as says an early instruction, "to square our actions and to keep them within due bounds," they are so seldom seen apart, but are so kept together, either as two Great Lights, or as a jewel worn once by the Master of the Lodge, now by the Past Master—that they have come at last to be recognized as the proper badge of a Master Mason, just as the Triple Tau is of a Royal Arch Mason or the Passion Cross of a Knight Templar.

So universally has this symbol been recognized, even by the profane world, as the peculiar characteristic of Freemasonry, that it has recently been made in the United States the subject of a legal decision. A manufacturer of flour having made, in 1873, an application to the Patent Office for permission to adopt the Square and Compasses as a trade-mark, the Commissioner of Patents, .J. M. Thatcher, refused the permission as the mark was a Masonic symbol.

If this emblem were something other than precisely what it is—either less known", less significant, or fully and universally understood—all this might readily be admitted. But, Considering its peculiar character and relation to the public, an anomalous question is presented. There can be no doubt that this device, so commonly worn and employed by Masons, has an established mystic significance, universally recognized as existing; whether comprehended by all or not, is not material to this issue. In view of the magnitude and extent of the Masonic organization, it is impossible to divest its symbols, or at least this particular symbol—perhaps the best known of all—of its ordinary signification, wherever displaced, either as an arbitrary character or otherwise.

It will be universally understood, or misunderstood, as having a Masonic significance; and, therefore, as a trade-mark, must constantly work deception. Nothing could be more mischievous than to create as a monopoly, and uphold by the poser of lacy anything so calculated. as applied to purposes of trade. to be misinterpreted, to mislead all classes, and to constantly foster suggestions of mystery in affairs of business (see Infringing upon Freemasonry, also Imitative Societies, and Clandestine).

In a religious work by John Davies, entitled Summa Totalis, or All in All and the Same Forever, printed in 1607, we find an allusion to the Square and Compasses by a profane in a really Masonic sense. The author, who proposes to describe mystically the form of the Deity, says in his dedication:

Yet I this forme of formelesse Deity,

Drewe by the Squire and Compasse of our Creed.

In Masonic symbolism the Square and Compasses refer to the Freemason's duty to the Craft and to himself; hence it is properly a symbol of brotherhood, and there significantly adopted as the badge or token of the Fraternity.

Berage, in his work on the higher Degrees, Les plus secrets Mystéres des Hauts Grades, or The Most Secret Mysteries of the High Grades, gives a new interpretation to the symbol. He says: "The Square and the Compasses represent the union of the Old and New Testaments. None of the high Degrees recognize this interpretation, although their symbolism of the two implements differs somewhat from that of Symbolic Freemasonry.

The Square is with them peculiarly appropriated to the lower Degrees, as founded on the Operative Art; while the Compasses, as an implement of higher character and uses, is attributed to the Decrees, which claim to have a more elevated and philosophical foundation. Thus they speak of the initiate, when he passes from the Blue Lodge to the Lodge of Perfection, as 'passing from the Square to the Compasses,' to indicate a progressive elevation in his studies. Yet even in the high Degrees, the square and compasses combined retain their primitive signification as a symbol of brotherhood and as a badge of the Order."

Square and Compass:

Source: The Builder October 1916

By Bro. B. C. Ward, Iowa

Worshipful Master and Brethren: Let us behold the glorious beauty that lies hidden beneath the symbolism of the Square and Compass; and first as to the Square. Geometry, the first and noblest of the sciences, is the basis on which the superstructure of Masonry has been erected. As you know, the word "Geometry" is derived from two Greek words which mean "to measure the earth," so that Geometry originated in measurement; and in those early days, when land first began to be measured, the Square, being a right angle, was the instrument used, so that in time the Square began to symbolize the Earth. And later it began to symbolize, Masonically, the earthly-in man, that is man's lower nature, and still later it began to symbolize man's duty in his earthly relations, or his moral obligations to his Fellowmen. The symbolism of the Square is as ancient as the Pyramids. The Egyptians used it in building the Pyramids. The base of every pyramid is a perfect square, and to the Egyptians the Square was their highest and most sacred emblem. Even the Chinese many, many centuries ago used the Square to represent Good, and Confucius in his writings speaks of the Square to represent a Just man.

As Masons we have adopted the 47th Problem of Euclid as the rule by which to determine or prove a perfect Square. Many of us remember with what interest we solved that problem in our school days. The Square has become our most significant Emblem. It rests upon the open Bible on this altar; it is one of the three great Lights; and it is the chief ornament of the Worshipful Master. There is a good reason why this distinction has been conferred upon the Square. There can be nothing truer than a perfect Square--a right angle. Hence the Square has become an emblem of Perfection.

Now a few words as to the Compass: Astronomy was the second great science promulgated among men. In the process of Man's evolution there came a time when he began to look up to the stars and wonder at the vaulted Heavens above him. When he began to study the stars, he found that the Square was not adapted to the measurement of the Heavens. He must have circular measure; he needed to draw a circle from a central point, and so the Compass was employed. By the use of the Compass man began to study the starry Heavens, and as the Square primarily symbolized the Earth, the Compass began to symbolize the Heavens, the celestial canopy, the study of which has led men to think of God, and adore Him as the Supreme Architect of the Universe. In later times the Compass began to symbolize the spiritual or higher nature of man, and it is a significant fact that the circumference of a circle, which is a line without end, has become an emblem of Eternity and symbolizes Divinity; so the Compass, and the circle drawn by the Compass, both point men Heavenward and Godward.

The Masonic teaching concerning the two points of the Compass is very interesting and instructive. The novitiate in Masonry, as he kneels at this altar, and asks for Light sees the Square, which symbolizes his lower nature, he may well note the position of the Compass. As he takes another step, and asks for more Light, the position of the Compass is changed somewhat, symbolizing that his spiritual nature can, in some measure, overcome his evil tendencies. As he takes another step in Masonry, and asks for further Light, and hears the significant words, "and God said let there be Light, and there was Light," he sees the Compass in new light; and for the first time he sees the meaning, thus unmistakably alluding to the sacred and eternal truth that as the Heavens are higher than the Earth, so the spiritual is higher than the material, and the spiritual in man must have its proper place, and should be above his lower nature, and dominate all his thoughts and actions. That eminent Philosopher, Edmund Burke, once said, "It is ordained that men of intemperate passions cannot be free. Their passions forge the chains which bind them, and make them slaves." Burke was right. Masonry, through the beautiful symbolism of the Compass, tells us how we can be free men, by permitting the spiritual within us to overcome our evil tendencies, and dominate all our thoughts and actions. Brethren, sometimes in the silent quiet hour, as we think of this conflict between our lower and higher natures, we sometimes say in the words of another, "Show me the way and let me bravely climb to where all conflicts with the flesh shall cease. Show me that way. Show me the way up to a higher plane where my body shall be servant of my Soul. Show me that way."

Brethren, if that prayer expresses desire of our hearts, let us take heed to the beautiful teachings of the Compass, which silently and persistently tells each one of us,

"You should not in the valley stay

While the great horizons stretch away

The very cliffs that wall you round

Are ladders up to higher ground.

And Heaven draws near as you ascend,

The Breeze invites, the Stars befriend.

All things are beckoning to the Best,

Then climb toward God and find sweet Rest.”

The secrets of Freemasonry are concerned with its traditional modes of recognition. It is not a secret society, since all members are free to acknowledge their membership and will do so in response to enquiries for respectable reasons. Its constitutions and rules are available to the public. There is no secret about any of its aims and principles. Like many other societies, it regards some of its internal affairs as private matters for its members. In history there have been times and places where promoting equality, freedom of thought or liberty of conscience was dangerous. Most importantly though is a question of perspective. Each aspect of the craft has a meaning. Freemasonry has been described as a system of morality, veiled in allegory and illustrated by symbols. Such characteristics as virtue, honour and mercy, such virtues as temperance, fortitude, prudence and justice are empty clichés and hollow words unless presented within an ordered and closed framework. The lessons are not secret but the presentation is kept private to promote a clearer understanding in good time. It is also possible to view Masonic secrecy not as secrecy in and of itself, but rather as a symbol of privacy and discretion. By not revealing Masonic secrets, or acknowledging the many published exposures, freemasons demonstrate that they are men of discretion, worthy of confidences, and that they place a high value on their word and bond.

Masonic Square and Compasses.

The Square and Compasses (or, more correctly, a square and a set of compasses joined together) is the single most identifiable symbol of Freemasonry. Both the square and compasses are architect's tools and are used in Masonic ritual as emblems to teach symbolic lessons. Some Lodges and rituals explain these symbols as lessons in conduct: for example, Duncan's Masonic Monitor of 1866 explains them as: "The square, to square our actions; The compasses, to circumscribe and keep us within bounds with all mankind".

However, as Freemasonry is non-dogmatic, there is no general interpretation for these symbols (or any Masonic symbol) that is used by Freemasonry as a whole.

Square and Compasses:

Source: Mackey's Encyclopedia of Freemasonry

These two symbols have been so long and so universally combined — to teach us, as says an early instruction, "to square our actions and to keep them within due bounds," they are so seldom seen apart, but are so kept together, either as two Great Lights, or as a jewel worn once by the Master of the Lodge, now by the Past Master—that they have come at last to be recognized as the proper badge of a Master Mason, just as the Triple Tau is of a Royal Arch Mason or the Passion Cross of a Knight Templar.

So universally has this symbol been recognized, even by the profane world, as the peculiar characteristic of Freemasonry, that it has recently been made in the United States the subject of a legal decision. A manufacturer of flour having made, in 1873, an application to the Patent Office for permission to adopt the Square and Compasses as a trade-mark, the Commissioner of Patents, .J. M. Thatcher, refused the permission as the mark was a Masonic symbol.

If this emblem were something other than precisely what it is—either less known", less significant, or fully and universally understood—all this might readily be admitted. But, Considering its peculiar character and relation to the public, an anomalous question is presented. There can be no doubt that this device, so commonly worn and employed by Masons, has an established mystic significance, universally recognized as existing; whether comprehended by all or not, is not material to this issue. In view of the magnitude and extent of the Masonic organization, it is impossible to divest its symbols, or at least this particular symbol—perhaps the best known of all—of its ordinary signification, wherever displaced, either as an arbitrary character or otherwise.

It will be universally understood, or misunderstood, as having a Masonic significance; and, therefore, as a trade-mark, must constantly work deception. Nothing could be more mischievous than to create as a monopoly, and uphold by the poser of lacy anything so calculated. as applied to purposes of trade. to be misinterpreted, to mislead all classes, and to constantly foster suggestions of mystery in affairs of business (see Infringing upon Freemasonry, also Imitative Societies, and Clandestine).

In a religious work by John Davies, entitled Summa Totalis, or All in All and the Same Forever, printed in 1607, we find an allusion to the Square and Compasses by a profane in a really Masonic sense. The author, who proposes to describe mystically the form of the Deity, says in his dedication:

Yet I this forme of formelesse Deity,

Drewe by the Squire and Compasse of our Creed.

In Masonic symbolism the Square and Compasses refer to the Freemason's duty to the Craft and to himself; hence it is properly a symbol of brotherhood, and there significantly adopted as the badge or token of the Fraternity.

Berage, in his work on the higher Degrees, Les plus secrets Mystéres des Hauts Grades, or The Most Secret Mysteries of the High Grades, gives a new interpretation to the symbol. He says: "The Square and the Compasses represent the union of the Old and New Testaments. None of the high Degrees recognize this interpretation, although their symbolism of the two implements differs somewhat from that of Symbolic Freemasonry.

The Square is with them peculiarly appropriated to the lower Degrees, as founded on the Operative Art; while the Compasses, as an implement of higher character and uses, is attributed to the Decrees, which claim to have a more elevated and philosophical foundation. Thus they speak of the initiate, when he passes from the Blue Lodge to the Lodge of Perfection, as 'passing from the Square to the Compasses,' to indicate a progressive elevation in his studies. Yet even in the high Degrees, the square and compasses combined retain their primitive signification as a symbol of brotherhood and as a badge of the Order."

Square and Compass:

Source: The Builder October 1916

By Bro. B. C. Ward, Iowa

Worshipful Master and Brethren: Let us behold the glorious beauty that lies hidden beneath the symbolism of the Square and Compass; and first as to the Square. Geometry, the first and noblest of the sciences, is the basis on which the superstructure of Masonry has been erected. As you know, the word "Geometry" is derived from two Greek words which mean "to measure the earth," so that Geometry originated in measurement; and in those early days, when land first began to be measured, the Square, being a right angle, was the instrument used, so that in time the Square began to symbolize the Earth. And later it began to symbolize, Masonically, the earthly-in man, that is man's lower nature, and still later it began to symbolize man's duty in his earthly relations, or his moral obligations to his Fellowmen. The symbolism of the Square is as ancient as the Pyramids. The Egyptians used it in building the Pyramids. The base of every pyramid is a perfect square, and to the Egyptians the Square was their highest and most sacred emblem. Even the Chinese many, many centuries ago used the Square to represent Good, and Confucius in his writings speaks of the Square to represent a Just man.

As Masons we have adopted the 47th Problem of Euclid as the rule by which to determine or prove a perfect Square. Many of us remember with what interest we solved that problem in our school days. The Square has become our most significant Emblem. It rests upon the open Bible on this altar; it is one of the three great Lights; and it is the chief ornament of the Worshipful Master. There is a good reason why this distinction has been conferred upon the Square. There can be nothing truer than a perfect Square--a right angle. Hence the Square has become an emblem of Perfection.

Now a few words as to the Compass: Astronomy was the second great science promulgated among men. In the process of Man's evolution there came a time when he began to look up to the stars and wonder at the vaulted Heavens above him. When he began to study the stars, he found that the Square was not adapted to the measurement of the Heavens. He must have circular measure; he needed to draw a circle from a central point, and so the Compass was employed. By the use of the Compass man began to study the starry Heavens, and as the Square primarily symbolized the Earth, the Compass began to symbolize the Heavens, the celestial canopy, the study of which has led men to think of God, and adore Him as the Supreme Architect of the Universe. In later times the Compass began to symbolize the spiritual or higher nature of man, and it is a significant fact that the circumference of a circle, which is a line without end, has become an emblem of Eternity and symbolizes Divinity; so the Compass, and the circle drawn by the Compass, both point men Heavenward and Godward.

The Masonic teaching concerning the two points of the Compass is very interesting and instructive. The novitiate in Masonry, as he kneels at this altar, and asks for Light sees the Square, which symbolizes his lower nature, he may well note the position of the Compass. As he takes another step, and asks for more Light, the position of the Compass is changed somewhat, symbolizing that his spiritual nature can, in some measure, overcome his evil tendencies. As he takes another step in Masonry, and asks for further Light, and hears the significant words, "and God said let there be Light, and there was Light," he sees the Compass in new light; and for the first time he sees the meaning, thus unmistakably alluding to the sacred and eternal truth that as the Heavens are higher than the Earth, so the spiritual is higher than the material, and the spiritual in man must have its proper place, and should be above his lower nature, and dominate all his thoughts and actions. That eminent Philosopher, Edmund Burke, once said, "It is ordained that men of intemperate passions cannot be free. Their passions forge the chains which bind them, and make them slaves." Burke was right. Masonry, through the beautiful symbolism of the Compass, tells us how we can be free men, by permitting the spiritual within us to overcome our evil tendencies, and dominate all our thoughts and actions. Brethren, sometimes in the silent quiet hour, as we think of this conflict between our lower and higher natures, we sometimes say in the words of another, "Show me the way and let me bravely climb to where all conflicts with the flesh shall cease. Show me that way. Show me the way up to a higher plane where my body shall be servant of my Soul. Show me that way."

Brethren, if that prayer expresses desire of our hearts, let us take heed to the beautiful teachings of the Compass, which silently and persistently tells each one of us,

"You should not in the valley stay

While the great horizons stretch away

The very cliffs that wall you round

Are ladders up to higher ground.

And Heaven draws near as you ascend,

The Breeze invites, the Stars befriend.

All things are beckoning to the Best,

Then climb toward God and find sweet Rest."

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