NATURAL HISTORY OF SILVER.

143 .

Class V... .EXCEEDINGLY DUCTILE AND' DIFFICULTLYOXIDABLE METALS.

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SILVER.

PART LTII.

SECT. I.

NATURAL HISTORY OF SILVER

This metal is found both native and mineralized, and com-bined with lead, copper, mercury, cobalt, sulphur, arsenic, See.The principal ores of this metal are the following: Native silver,antimoniated silver, sulphuret of silver, sulphurated oxid ofsilver and antimony, muriate of silver, native oxid of silver,&c. It is found in different parts of the earth. The mines ofthe Erzgebiirge or the metalliferous rocks of Mexico and Potosi,Bohemia, Norway, Transylvania, kc. are the richest.

Native silver possesses all the propfertieS of this metal, and itappears in series of octahedra inserted in one another; in smallcapillary flexible threads intwined together; in plates; or in