"At the count of four," said the demonstrator. "I'll release the switch that fires the cannon. On the translucent screen you'll see the bullet just as it strikes the wire."
In the soundproof room that Westinghouse researchers call the "trick parlor," a knot of newshawks waited. The "trick parlor' is in the East Pittsburgh laboratories of Westinghouse Electric & Mfg. Co. On demonstration day last week it was pitch dark. Scheduled performer was Westinghouse's versatile "Ignitron" tube, invented by Drs. Joseph Slepian, 44, and Leon Robert Ludwig,...
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