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 399
each being independently controlledby an ordinary switch, or the two by a double switch, thuspermitting operation 1. With either circuit on; 2. With both circuits on. ELECTRIC HEA TING 3,053 In some cases the internal circuit is divided into two partsof unequal heating capacity so three heating…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
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