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Gold Welding

Gold may be welded together with any metal, if the right methods are employed, but best with copper. Some recipes for
 welding agents are here given.

1. – Two parts by weight (16 ounces equal 1 pound) of
Green vitriol; 1 part by weight (16 ounces equal 1 pound) of
Saltpeter; 6 parts by weight (16 ounces equal 1 pound) of
Common salt; 1 part by weight (16 ounces equal 1 pound) of
Black manganic oxide or pulverized, and mixed with 48 parts by weight
(16 ounces equal 1 pound) of good welding sand.