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 34
with the most delicate electroscopes obtainable.Faraday found that the outside of the box could *be charged sostrongly that long sparks would fly from it without any elec-rical effects being observable anywhere inside the box. To repeat the experiment in modified form, let an electroscope beplaced… … Fig. 15.—The electric screen. A screen of wire gauze surrounding a delicate electrical instrwment will protect it from external electrostatic induction. Electrification by Induction.—An insulated conductor,charged with either kind of electricity, acts on bodies in aneutral state placed near it in a…
Electrical engineering
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