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 310
is then poured out and the carbonplate inserted, the space between it and the blotting paper being filledwith the oxide of manganese mixed with granulated carbon, which ismoistened with the electrolyte. A layer of dry sand is spread over thetop of this cell onto which is poured hot pitch. When this… … PUSH BUTTON 16 GR LAMP RESISTANCEFig. 3,303.—Method of operating a bell from electric light circuit. The resistance acrossthe terminals of the bell, when the push is depressed, in about 7 ohms, correspondingto the resistance of about 25 feet of No. 21, German silver wire. The lamp in circuitis an…
Electrical engineering
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