Word: vacuum
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Dates: during 1930-1939
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...about a foot long, taken from the tumbling waters of a mountain stream. It has two mouths. Instead of scales it has what seem to be plates of silver. When the currents (which at times go 50 m. p. h.) are too fast for the ganoid, it creates a vacuum in its lower jowls, hangs on a rock by the suction and brakes itself with the plates of its silver armor...
...only 18 centimetres (7.09 in.) long carried two-way conversations across the English Channel. International Telephone & Telegraph Laboratories and Le Matériel Télephonique of France made the test. Simple equipment did the work. Sending and receiving devices were practically the same. Each device consisted of a vacuum tube which transformed telephone frequency into the high micro-ray frequency of 1,600,000,000 oscillations a second. Wires carried the oscillations to an antenna two centimetres (less than one inch) long. The antenna was fixed at the focal points of two curved reflectors which faced each other...
...week World Petroleum scouted the rumor that Soviet oil may capture the rich Chinese market (chiefly in kerosene) from U. S. interests. It was thought that the U. S. S. R. was afraid that by fighting for China it would antagonize Standard Oil of New York and its fiancee, Vacuum Oil, large purchasers of Soviet...
...imperceptible cushion of air held between a thumb and forefinger when their tips rub gently against each other is thicker than the film of glass with which Westinghouse Lamp Co. is sealing certain of its vacuum tubes. That glass is one five-thousandth of an inch thick. Last week Dr. Charles Morse Slack, the company's research physicist, received its annual $500 award for accomplishing the thin sealing...
...Slack's Westinghouse task was to make more permeable windows. A film of glass would serve, were it stout enough to withstand the suction of the Lenard vacuum tubes. Dr. Slack rounds the end of his vacuum tube until it resembles the butt of a test tube. Then he blows the glass to gossamer thinness. A last step is to exhaust the tube. This creates a knob at the tube's end, a knob so frail that when shattered its glassy film floats in air. so stout that it is as strong as steel. Result is that a pressure...