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 544
e metalutilized is not an essential item, although nickel plating is preferred. The sinusoidal current lays no claim to any special polar effectsand accommodates itself to the form of electrode most readily available. Copper, zinc, and iron are used largely for their antiseptic andastringent… … Fig. 4,628.—Mcintosh monomotive rheotome, for interrupting galvanic, faradic, or sinusoidalcurrent for therapeutic application. The range of interruption is from 20 to 400. Theinstrument consists of a clock work mechanism with platinum tipped contact, and iswound up with a key, running 45 minutes…
Electrical engineering
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