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 70
d circuit work; its electromotive, forgeis about 2,14 volts. 50 HAWKINS ELECTRICITY 5. The zinc should be lifted out occasionally and the sulphate washed off.C. The supply of mercury in the porous cell should be maintained, so as to have the zinc always well amalgamated.7. To renew, clean all… … Fig. 48.—Edison cell, type R R. The electrolyte used is caustic soda, the positive elementzinc, and the negative element copper oxide. The Edison cell is suitable for large sta-tionary gas engine ignition, railroad crossing signals, electroplating, fire alarms, telephonecircuits, etc. The positive…
Electrical engineering
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