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 37
g,by the principle of induction, an unlimited number of chargesoj electricity from one single charge. STATIC ELECTRICITY 17 It consists of two parts, as shown in fig. 19, a round cake ofresinous material B, cast in a metal dish or sole about onefoot in diameter, and a round disc A, of slightly… … Figs. 18 and 19.—The electrophorus and method of using. Charge B; place A in contactwith B, and touch A (fig. 18). The disc is now charged by induction and will yield aspark when touched by the hand, as in fig. 19. To use the electrophorus, the resinous cake B must be firstbeaten or rubbed with fur…
Electrical engineering
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