A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 379
e of carbon E, pointedat both ends, is inserted in holes near the ends ofcross-pieces of carbon B and C. The thin uprightboard A, on which these are supported, acts as a sounding board or diaphragm, and its movementsby sound waves are at once audible to a personlistening at the receiving telephone.… … Fig 397- Microphone. Microphone Relay.—(See Relay, Micro-phone) Micro-Seismograph.—(See Seismograph,Micro) Microtasimeter.—An apparatus inventedby Edison to measure minute differences oftemperature, or of moisture, by the resultingdifferences of pressure. A change of temperature, or moisture, is…
Electricity · Electrical engineering
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