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 30
Figs. 2.925 and 2,926.—Magneto set telephone; views showing case closed and open The- transmitter connections are made of stranded copper wire with a double silk insulation.These wires lead from the transmitter through the hollow arm to the inside of the door.From here one wire goes to one terminal…
Electrical engineering
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