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 508
rk, as they would soon wear away underthe dissolving action of the potash. Other useful forms of brush are the horse hair sawdust brush shownin fig. 4,566; various forms and sizes^of wire foundry brushes shown infig. 4,567; cup shaped brushes of wife or bristles for watch case work,and steel wire…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
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