- Silver

—A precious metal of a white lustrous appearance, having a specific gravity of 10.56 and a melting point of 1733° Fahr. Silver is the best conductor of electricity. It is soft and can be beaten out into extremely thin leaves (silver leaf); it requires the addition of copper to make it hard enough for general use; as, sterving silver, consisting of.925 silver and.075 copper. The metal does not oxidize at any temperature in the air, but it is blackened by sulphuretted hydrogen, hence, polished silver articles tarnish when exposed to the air. Silver is found free in various parts of the world, as a chloride or horn silver, and in various sulphides.