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Roger Bertling, owner of Houston-based Best Redi-Mix, chooses Kenworth as his company's standard because of its fit and finish. In the past, he's chosen the Kenworth T800. But the T880 offers drivers so much more, he says. "The first thing I noticed was the increased visibility out of the truck – the windshield is huge (50 percent larger windshield surface area than in the T800), and the cab ergonomics and more space between the seats are great."
File name: 08_02_001314
Box label: Harbor views: Long Island
Title: Redi-mix concrete
Alternative title:
Creator/Contributor:
Date issued:
Date created: 1950-08-30
Physical description: 1 photographic print : gelatin silver ; 8 x 10 in.
Genre: Gelatin silver prints
Subjects: Harbors; Islands; Construction equipment; Concrete mixers
Notes: Additional information from image caption: Merritt-Chapman & Scott Corp. Long Island viaduct. Neg. #3; Handwritten note on item: Long Island viaduct. 1950s photo of the construction.
Provenance: Transfer from old City Hall annex, August 1970
Statement of responsibility: Alfred A. Johnsen
Location: Boston Public Library, Print Department
Rights: Rights status not evaluated.
Shown here, Redi-Screens (the "Casbah" in custom sizes) are used to create privacy in style by mounting over full-lite doors! www.crestviewdoors.com/products/redi-screens/redi-screens...
"The eldest of the nine sons of Gregorio and Cecilia de' Ghinci, Francesco Redi was born in Arezzo, Italy, February 18, 1626. His father was an important physician, who went to Florence in 1642 and became First Physician of the Grand Duke of Tuscany. Francesco studied in Florence at the Jesuits' schools and took a degree in medicine in Pisa in 1647. After travelling to Rome, Naples, Bologna, Padua and Venice, he began to practice the profession of physician, living in his father's house until 1672, when Gregorio Redi returned to Arezzo and Francesco remained alone in Florence. From 1657 to 1667 he was a member of the Accademia del Cimento (Academy of the Experiment), where the Galileian heritage continued.
In 1666 Grand Duke Ferdinando II appointed Redi as his First Physician and director of the grand-ducal "Spezieria" (Pharmacy): positions in which he was confirmed by Cosimo III in 1670, when he became Grand Duke. So Redi spent much of his life at the Medici's Court and was, after Galileo, a unique example of scientist and courtier."
"From the time of the ancient Romans, through the Middle Ages, and until the late nineteenth century, it was generally accepted that some life forms arose spontaneously from non-living matter. Such "spontaneous generation" appeared to occur primarily in decaying matter. For example, a seventeenth century recipe for the spontaneous production of mice required placing sweaty underwear and husks of wheat in an open-mouthed jar, then waiting for about 21 days, during which time it was alleged that the sweat from the underwear would penetrate the husks of wheat, changing them into mice. Although such a concept may seem laughable today, it is consistent with the other widely held cultural and religious beliefs of the time.
The first serious attack on the idea of spontaneous generation was made in 1668 by Francesco Redi, an Italian physician and poet. At that time, it was widely held that maggots arose spontaneously in rotting meat. Redi believed that maggots developed from eggs laid by flies. To test his hypothesis, he set out meat in a variety of flasks, some open to the air, some sealed completely, and others covered with gauze. As he had expected, maggots appeared only in the open flasks in which the flies could reach the meat and lay their eggs.
This was one of the first examples of an experiment in the modern sense, in which controls are used. In spite of his well-executed experiment, the belief in spontaneous generation remained strong, and even Redi continued to believe it occurred under some circumstances. The invention of the microscope only served to enhance this belief. Microscopy revealed a whole new world of organisms that appeared to arise spontaneously. It was quickly learned that to create "animalcules," as the organisms were called, you needed only to place hay in water and wait a few days before examining your new creations under the microscope.
The debate over spontaneous generation continued for centuries. In 1745, John Needham, an English clergyman, proposed what he considered the definitive experiment. Everyone knew that boiling killed microorganisms, so he proposed to test whether or not microorganisms appeared spontaneously after boiling. He boiled chicken broth, put it into a flask, sealed it, and waited - sure enough, microorganisms grew. Needham claimed victory for spontaneous generation.
An Italian priest, Lazzaro Spallanzani, was not convinced, and he suggested that perhaps the microorganisms had entered the broth from the air after the broth was boiled, but before it was sealed. To test his theory, he modified Needham's experiment - he placed the chicken broth in a flask, sealed the flask, drew off the air to create a partial vacuum, then boiled the broth. No microorganisms grew. Proponents of spontaneous generation argued that Spallanzani had only proven that spontaneous generation could not occur without air.
The theory of spontaneous generation was finally laid to rest in 1859 by the young French chemist, Louis Pasteur. The French Academy of Sciences sponsored a contest for the best experiment either proving or disproving spontaneous generation. Pasteur's winning experiment was a variation of the methods of Needham and Spallanzani. He boiled meat broth in a flask, heated the neck of the flask in a flame until it became pliable, and bent it into the shape of an S. Air could enter the flask, but airborne microorganisms could not - they would settle by gravity in the neck. As Pasteur had expected, no microorganisms grew. When Pasteur tilted the flask so that the broth reached the lowest point in the neck, where any airborne particles would have settled, the broth rapidly became cloudy with life. Pasteur had both refuted the theory of spontaneous generation and convincingly demonstrated that microorganisms are everywhere - even in the air. - The Slow Death of Spontaneous Generation by Russell Levine and Chris Evers