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 129
m the firstestablishment of the telegraph, the inconveniences arising fromthe multiplication of wire proved so serious that it becameurgently necessary to adopt measures of relief. The effort to 2,222 HAWKINS ELECTRICITY Pig. 3,067.—Bunnell special relayforMilliken repeater system. Inaddition to… … are in the main circuit which connects the battery and ground through the repeating contactpoints of the opposite sounder. The local sounder magnets are operated by the relay magnets.
Electrical engineering
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