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 511
he water dissolve in same aboutsix ounces of borax soap, ivory soap, or some other mild, pure qualitysoap. Common soaps will not answer as they contain alkalies, etc., whichattack both the balls and the work. ELECTRO-PLATING 3,165 Polishing Powders.—In order to hold fine powders on thewheels and… … Fig. 4,574.—Hanson and Van Winkle steel ball octagon shape burnishing barrel. It is madeof cast iron and has a hard maple lining. Manufacturers put up powder in the form of a cake that is hardenough so that a small amount of composition may be evenly dis-tributed over the entire cutting surface of…
Electrical engineering
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