Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 177
sed upon 164 ELECTRICITY IN MODERN LIFE. the discovery made by the inventor that if a metalHc platewere allowed to slide over certain prepared surfaces, suchas chalk moistened with an easily decomposed electrolytelike potassic iodide, the frictional resistance to sliding couldbe very greatly… … Fig. 51-a strip of platinum supported by a thin mica diaphragm,and made to press with a constant pressure against thecylinder by the spring S, which is capable of adjustmentby the screw E. The current from the transmitter flowsthrough the support H to the chalk cylinder A, and thencethrough the…
Electric industries · Electricity
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