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Amalgam of Fusible Metal

moved. It is now far preferable to the celc- Fusible metal forms an amalgam with s of brated copper amalgam, as it retains its white its weight of mercury, which fuses far below color in the mouth, while the other turns the boiling point of water; cadmium increases dark. The hardness is a little less than that the fusibility still more. A mixed amalgam of the copper amalgam. (See No. 3542.) for injecting anatomical preparations, which is hard at ordinary temperature, but becomes soft at 150°, and fuses at 176° Fahr., consists of 20 parts of bismuth, 12 of lead, 7 of tin, and 4 of mercury. (See Nos. 3456, &c.) 3554. To Recover the Silver Alloy from Dentists' Amalgam. The silver alloy may be easily obtained from scraps of dentists' amalgam in the following manner:

Provide 2 crucibles of different sizes, so that 3548. Amalgam for Varnishing the smaller one, inverted, will rest a little way Plaster Casts. Melt together 1 part each within the larger. Make a hole, about 1 inch Casts. Melt together 1 part each within the larger. Make a hole, about 4 inch tin and bismuth, and stir in thoroughly 1 part in diameter, in the bottom of the smaller, to mercury. When cool, pound the amalgam provide a vent for the mercurial vapors. with white of egg, forming a metallic paint Place the pieces of amalgam in the larger which may be laid on with a brush. crucible, invert the smaller one into it, lute