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 38
The cover may be replaced, touched, and once moreremoved, and will thus yield any number of sparks, the original 18 HAWKINS ELECTRICITY charge on the resinous plate meanwhile remaining practicallyas strong as before. The theory of the electrophorus is very simple, provided thestudent has clearly… … I * I 11 Figs. 20 to 23.—Illustrating how the electrophorus works. when the metal disc is placed down upon it, it rests really onlyon three or four points of the surface, and may be regarded asan insulated conductor in the presence of an electrified body.The negative electrification of the cake…
Electrical engineering
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