Word: discs
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Dates: during 1920-1929
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...down the tube's other neck, a foot long, the sides of which were likewise sheathed in metal to guide the electrons on their way. At the tube's end was the main feature of the invention, the "window." This constituted a vast improvement upon the aluminum disc of earlier experiments. It was a sheet of nickel 1/2000 of an inch thin and three inches in diameter, supported against the 100-pound suction of the vacuum tube by skeleton struts of molybdenum. The molecular structure of nickel is such that molecules of air (oxygen, nitrogen) cannot pass through...
Acetylene gas in a sealed tube was reduced to a surprisingly large quantity of yellow powder, resembling varnish, which resisted all chemical reagents and a heat of 4000°. The powder was a substance utterly unknown to chemists. Precipitated by the ray upon an aluminum disc, the powder became an enamel which could not be removed...
...dangerous Newton High team on the Arena ice. For nearly one full period the speedy schoolboy six held the Crimson first-year men on even terms. The 1929 squad were superior to the Newton stickmen in combination play, and the Crimson forwards held a decided edge in dribbling the disc through the outer defense. In speed and stick work the visitors were on a par with the winners...
Carlton, the blond 1929 flash, put the first-year skaters in the lead against Newton, when he found the net before the end of the first session after taking a pass from Whiting. The disc failed to clear the ice but slipped through the guard of Thompson, Newton cage guardian. Holbrook, the brilliant leader of the schoolboys, who was forced out of the game for a few minutes in the initial period with a cut on the hand, contributed several long dashes and narrowly missed two hard drives at the Crimson cage...
...from the original rotorship of Herr Anton Flettner of Germany (TIME, Nov. 17, Dec. 8, Mar. 2), in two respects: Where Flettner's R. S. Buckau had had two rotor cylinders, the lieutenants used but one, believing they thus avoided a detrimental interaction; where the base and top disc of the Flettner cylinder had revolved, in the U. S. design it was stationary. The motive principle was the same as Flettner's, however: the Magnus principle, that wind passing over any surface creates suction on that surface, greatest on any part of the surface that does not move...