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 25
Jf.ts <3 > O u, ai 8 g ^ g ^ Sag** I cd aj O d OS ^ O Oh Ol d bo arzj Ci CD, . w cS 0+>(A o Telephone trans-mitters are made ina great variety ofform. A carbontransmitter of thesolid back type isthe form most ex-tensively used in theUnited States. Fig.2,918 shows the dia-gram of a solid…
Electrical engineering
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