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 69
zinc in a solution of dilute sulphuric acid, and then in a bath of mercury, and rub it with a brush or cloth so as toreach all parts of the surface. 3. Pour into the porous cell one ounce (a tablespoonful) of mercury, and fill the porous cell with water up to within two inches of the top. 4. Place…
Electrical engineering
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