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 507
Figs. 4,563 to 4,567—Various brushes. Fig. 4,563, jewelers shoe handle wash out hand brush;fig. 4,564, flat scouring brush; fig. 4,565, cotton potash brush; fig. 4,566, sawdust brush;fig. 4,567, wire foundry brush. Fig. 4,563 shows a jewelers wash out brush. They are made withboth straight and…
Electrical engineering
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