Westinghouse last week demonstrated in Manhattan an electric fruit taster. The inventor, Richard C. Hitchcock, Westinghouse electronic engineer, originally built the device to measure the minute" variations of currents which flow through radio, photoelectric and other vacuum tubes. It records the action of one-millionth of an ampere, a force about one-tenth the "wing power" of a house fly. The principle involved is the one Alessandro Volta (1745-1827) discovered 133 years ago when he placed two pieces of dissimilar metal in an acid solution: that an electric current circulates between the metals.
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