Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 278
a key into the coppersulphate solution used in a gravity cell, the knife is in-stantly copper plated by chemical action. If a sheet ofiron, sprinkled with sal ammoniac is dipped in a bath ofmelted zinc it is chemically plated and is called galvanized Electro platIng 279 iron. Electricity had… … Fig. 137. Electro-plating Cell. Make a bath of i gallon water, 10 oz. potassium cyanide(deadly poison), 5 oz. of copper carbonate, and 2 oz.potassium carbonate. Place in a glass or wooden tub, connect to positivewire a slab of copper (Fig. 137), and to negative wirethe thoroughly cleaned articles.…
Electricity
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