Trebel, George. [from old catalog] · New York, F. Tousey · leaf 57
he bath usedis a solution of a salt of the metal to be deposited. The cyan-ides of gold and silver are generally used for gilding and sil-vering. Many of the base metals require to be electro-coppered firstin order to secure the adhesion of the gold or silver. The mag-neto-electric machine has… … plate covered with powdered platinum and immersed in asolution of one part of sulphuric acid to nineteen parts of water,is the best. Two cells are required to work properly. All arti-cles that are to be plated must be thoroughly cleaned withacid, and must be free from grease. The word telegraph…
Electricity
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