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 123
assing through the cell. EFFECTS OF THE CURRENT 103 Gernez has recently shown that in a bent closed tube, containing twoportions of liquid, one of which is made highly + and the other highly —,the liquid passes over from + to —. This apparent distillation is notdue to difference of temperature, nor… … Fig. 92.—Effect of the electric current on a frogs legs; discovered in 1678 by Galvani. Muscular Contractions.—It was discovered in 1678 thatwhen a portion of muscle of a frogs leg, hanging by a thread ofnerve bound with a silver wire, was held over a copper supportso that both nerve and wire…
Electrical engineering
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