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- · New York, T. Audel · leaf 213
Figs. 1.056 and 1,056.—Willard plates; tig. 1,055, negative plates; fig. 1,056. positive plates.Both positive and negative plates are of the Plantetype, made from one integral pieceofrolled lead. These are grooved plates. The projections are tapered, that is, they arewider at the base than at the… … 1.057.—Wood separator for spacing the plates, as used in the Willard storage cells. 902 HAWKINS ELECTRICITY
Electrical engineering
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