Word: vapor
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Dates: during 1940-1949
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...British chemist named Greville Williams broke down natural rubber by distillation, obtained a hydrocarbon compound called isoprene. In 1882 William Tilden, also of Britain, made isoprene by .racking turpentine vapor in a red-hot tube...
...Maryland's Aberdeen Proving Ground to a wooden stand overlooking a large, wet field. Soldiers stood on guard. In the middle of the field, some 2,500 feet away, stood a gibbety-looking pole, with a baglike object suspended from it. From the pendent object oozed a steamy vapor...
When ozone is bubbled through a dilute pyrogallol solution, the liquid glows brightly though no heat is evolved. Not true is the common saying that scientists are still searching for "cold light." Fluorescent and vapor-discharge lamps (e.g., neon, sodium) are true "cold lights" in that heat is not what makes them shine...
When fluorescent lighting showed commercial possibilities several years ago, Hygrade researchers went quickly to work. Mercury vapor inside fluorescent lamps is ionized by an electric discharge between electrodes at each end, produces short ultraviolet rays which must then be converted by a fluorescent powder to visible light. In February Hygrade's chief research engineer, James L. Cox, got an award from N. A. M. for a new method of coating the lamps with a porous powder so that longer rays of the visible range are efficiently radiated. Costly to install, fluorescents waste only 75% of their energy in heat...
...Coffee is vacuum-packed by some canners because the oxygen in the air diminishes freshness and flavor. It occurred to Engineer Jay Erwin Tone of Des Moines that freshness and flavor might be even better preserved if, after air was pumped from the can, it was replaced by vapor from fresh-ground coffee. After several years of puttering, he invented a big machine which fills 3,000 coffee cans an hour with such vapor...