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 518
S ELECTRICITY of fine gold and the latter being composed of 80 parts of copper, 83parts zinc, and 6 parts nickel. The best solution for silver plating is the double cyanide ofsilver and potassium solution. The single cyanide of silver is prepared by adding a solution ofcyanide of potassium to a… … Fig. 4,581.—Polishing and buffing head. Polishing and buffing heads range in size from thosesufficiently strong to run wooden polishing wheels up to 16 inches in diameter, and thosedesigned to run 9 or 10 inch buffs at 3,000 revolutions per minute, to those known as lightpolishing heads, capable of…
Electrical engineering
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