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Magnesium  is a metal widely distributed over the globe, and chiefly mined in Austria, Germany and Greece. The metal is used in flash powders for photographic use, and in chemical manufacture, in fireproofing and lining furnaces.

Magnesite  (magnesium carbonate) is used in making carbon dioxide gas and epsom salts and for preparing magnesia (calcined magnesia).

Dolomite  (magnesium calcium carbonate) is common limestone, used for building. Found in many parts of the world. Calcined dolomite is used for lining iron furnaces.

Talc  (hydrous magnesium silicate), soapstone or steatite, is a soft mineral. Mined in Maryland, Virginia, North Carolina, etc., and in Europe. It is made into laundry tubs, firebrick, hearthstones, griddles, slate and tailor's pencils, gas tips, etc. Imported in small amount from France and Italy.

Meerschaum  or sepiolite (magnesium silicate), comes from Asia Minor and New Mexico. It is easily carved and made into pipes and cigar holders. Austria and France use large quantities. It is largely imitated.

Asbestos  is a fibrous variety of serpentine (a magnesium silicate). Mineral wool is an artificial fibrous mineral. It is mined in Quebec, Canada. Another variety of asbestos comes from Italy. Mines have been recently discovered in Wyoming. It is used as a fireproofing material. This mineral fiber is spun and woven into fireproof fabrics for theater curtains or made into felt building paper, pipe covering, etc.