Abstract
The process employed in Mexico for amalgamating ores containing sulphurets of silver, and which consists in adding to them a solution of bichloride of copper with chloride of sodium, is explained by Sonneschmidt, Humboldt, and Boussingault, on the supposition that a chloride of silver is formed at the same time that the sulphur combines with the copper. The author calls in question the truth of this theory, and proposes certain modifications of the process by the employment of a combination of deutoxide of copper with the bichloride, until an oxy-chloride is formed, and then adding finely precipitated copper, by which a salt of a brick-red colour is obtained, insoluble in water, and at a temperature of 200° Fahr. speedily reducing sulphuret of silver to the metallic state.
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