Word: heating
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Dates: during 1920-1929
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...found that the chief cause of irritation to the eyes of people working in conditions where the heat is extreme is the perspiration that gets into the eyes from the face and forehead...
...unaffected by sudden changes in temperature, can be welded without risk, and may be used for chemical beakers, thermometers, motion picture projection lenses or other apparatuses where glass is subject to intense heat, eliminating much costly breakage...
...infrared, which are cut out by ordinary glass. Owing to this property it is expected to be of great value to medicine. By it diseased areas of the throat, nose, ears, stomach, hitherto inaccessible cavities, may be subjected to the action of these germicidal rays, as well as to heat. A sun-room made of fused quartz panes would have the same effect as sunlight in the open air. A quartz lamp will give a healthy sunburn...
...perfect heat transmitter, remaining cool on the surface while the heat rays pass through a tube of it undiminished...
...lowest expansion ratio of any solid known. A tube of it one yard long, heated to 3,200 degrees Fahrenheit, increased but 1/50 inch in length. Platinum increases 1/3 inch when subjected to the same heat, and copper 3/5 inch. President S.W. Stratton, of M.I. T., former director of the Bureau of Standards, believes that all standards of length will now be made of fused quartz instead of platinum...