Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 213
l as to the aerialswitch of the receiver while the third and oppositely disposed post is connected directto the transmitter as in fig. 3,134. 2,304 HAWKINS ELECTRICITY Emergency Set.—This consists of a storage battery to whichis connected a voltmeter, a solenoid circuit breaker, a set ofresistance… … PlG. 3,152.—Form of oscillating waves. These electric waves are often called Hertzian wavesbecause of their discovery and demonstrative proof by Prof. Hertz. They may be severalfeet in length or several miles long, and are represented as the distance traveled throughspace during one cycle. The…
Electrical engineering
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