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I love the way this tells the temperature. It's most unique. en.wikipedia.org/wiki/Galileo_thermometer
I set up the thermometer with the probe sticking into the grill. I'm shooting for a temperature of about 225F. Right after set up, I was at 285F, so I closed the vents a little. I'll have to keep fiddling with it as the charcoal burns down and eventually I add more.
Pocket thermometer from around 1830, works with a bimetallic strip (two strips made of metals with different thermal expansion coefficients joined together such that the strip will twist if heated)
I hope it will never get that hot in my pocket!
Seen in the Technoseum, Mannheim, Germany
Camera: Leica R3 (10032), made in 1978
Leitz Summicron-R 90 mm (11219), made in 1977
Fujifilm Superia Xtra 800 colour negative film
Developed and scanned by www.meinfilmlab.de
The Galileo thermometer consists of a vertical glass tube, typically filled with water, and sealed glass bubbles containing coloured water or alcohol. Each bubble is also attached to a specific mass (labelled with the temperature it represents) to calibrate its density (the amount of mass in a given volume). The temperature can be read by interpreting the distribution of these bubbles. The principle of buoyancy states that if an object is less dense than a liquid, it floats; and if the object is denser than the liquid, it sinks.
When the temperature of the liquid in the glass tube begins to warm up, it expands; hence lowering the density of the liquid, as its mass now occupies a larger volume. The opposite occurs when the temperature cools (ie density of the liquid increases). Therefore, if a bubble becomes denser compared with the liquid, it sinks; and if less dense, it floats.
Another of the many cool things that can be found at Simonian Farms in Fresno, this old Dr. Pepper thermometer caught my eye. I love this kind of stuff! I think I just figured out the 10-2-4 on old Dr. Pepper bottles, too!
I recently added a 1-wire thermometer network, using the 1-wire USB adapter (DS9490R), temperature sensors (DS18S20), speaker wire, and audio plugs, jacks, and splitters.
A smaller version of this graph is shown on my Insteon thermostat web control page.
The temperature sensors seem to be very accurate (well, precise, at least). They're digital, so no calibration required (they are factory calibrated, I assume). And with 1-wire technology, you can string lots of them on one common data line (and ground, so it's actually a 2-wire system, but who's counting).
The sensor for the blue graph is run up inside one of the A/C vents, so I can get a direct indication of the A/C output. As you can see, it does about 1-2 cycles per hour. (I bumped the thermostat up from 78 to 80 around 10am.)
The outside sensor is hanging out the window by my computer, in the shade of the bushes and the big tree out front, so I don't think direct sunlight is affecting it much in the afternoons.
Oh, and this image is from a custom-made graphing page from the temperature logs using PHP and GD. Temperature logging is done by digitemp every 15 seconds.
An old thermometer on my Mamaw Ruby's porch. It wasn't a cold day but thankfully cooler than it has been being.
Two of my neighbors and friends have been undergoing treatment and surgeries related to cancer recently. I made these cookies to cheer them up and for them to share with their families and staff at the hospital.
Got bored again, trying to figure out what to shoot. This is one of those Galileo Thermometers and fiber optics
It's been ages since I've photographed my Galileo Thermometer. I had wanted one of these for some time and finally got one earlier this year. Today all the little bobbles are up at the top of the thermometer signifying a cooling trend.
This Pepsi thermometer is on Main Street, U.S. Route 61 Business in LaGrange, Missouri in Lewis County.
The thermometer named after him is made up of a sealed glass cylinder. Inside there is a clear liquid and a series of bulbs. Each bulb has a weight attached to it. As the temperature changes, they rise and fall depending of a number of mathematical principles. Yet the Galileo Thermometers has an aesthetic that goes beyond its function – it is a beautiful object in its own right
Autor: Society of Gentlemen
Descripción bibliográfica: A new and complete dictionary of arts and sciences : comprehending all the branches of useful knowledge, ... Illustrated with above three hundred copper-plates, ... The whole extracted from the best authors in all languages / By a society of gentlemen. - The second edition, with many additions, and other improvements. - London : printed for W. Owen, 1763-64. - 4 v. (1064,1061-3506 p.), il.: lám. ; 8º
Notas: Grab. calc. representando a Minerva: "S. Wale invt. et delin., C. Grignion sculp."
Localización: fama.us.es/record=b2656185~S5*spi
Vea la ilustración en su contexto
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This little thermometer works on the density of liquid. Read about it here: en.wikipedia.org/wiki/Galileo_thermometer