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 52
tioned, and it is only when all such breaks have 62 HAWKINS ELECTRICITY been properly bridged by suitable material, that is, by con-ductors, that the effects which denote the flow of the currentwill begin to be manifested. The necessary electromotive force 01 voltage required to causethe current to… … Fig. 37.—Voltas Crown of Cups. The metallic elements C and Z each consisted of two metals,the plate C being of copper and the plate Z of zinc. They were placed, as shown,in the glass vessels, which contained salt water and ordinary water or lye. Into eachvessel, except the two end ones, the copper…
Electrical engineering
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