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To Prepare a Brass Solution

Brass Solution. lution, take 1 pound carbonate of ammonia, 1 pound cyanide of potassium, 2 ounces cyanide of copper, and 1 ounce cyanide of zinc. This constitutes the solution for the decomposing cell. It may be prepared, also, from the above cyanide of potassium, by immersing in it a proportions of carbonate of ammonia and large sheet of brass of the desired quality, and making it the anode or positive electrode of a powerful galvanic battery or magnetoelectric machine; and making a small piece of metal the cathode or negative electrode, from which hydrogen must be freely evolved. This operation is continued till the solution has taken up a sufficient quantity of the brass to deposit.

For The solution (see No. 3768) may be used cold; 3769. Το Electroplate with Brass. but it is desirable , in many cases, to heat it (according to the nature of the articles to be deposited upon) to 212° Fahr. For or fancy work, about 150° Fahr. tery, or magneto-electric machine, must be will give excellent results.

The galvanic batcapable of evolving hydrogen freely from the cathode or negative electrode, or article atis preferred to have a large anode or positive electrode, as this favors the evolution of hydrogen. The article or articles treated as before described will immediately the process, any desired thickness may be obbecome coated with brass . By continuing