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 525
Bright Pickle for Iron:—Water, 10 quarts; concentrated sulphuricacid, 28 ozs.; zinc, 2 ozs.; nitric acid, 12 ozs. Mix in the order named.The pickle leaves the metal bright. Dip for Copper, Brass, etc.:—Sulphuric acid, 66° Baume, 50parts by weight; nitric acid, 36° Baume, 100 parts by weight;… … Figs. 4,596 to 4,601.—Characteristic disintegration stages of Munning-Loeb 2 bar anodes.I he nickel anode on the left weighed 14 lbs., that on the right in the last stage of dis-integration weighed 8J^ ounces; 3.8 per cent, waste. Cyanide Dip for Brass:—Potassium cyanide in ten times its weightof…
Electrical engineering
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