406 GRAPHITE FAMILY. earth and zeolite. It is also enumerated amongst the mineral productions of Prance, Savoy, Bohemia, Austria, Stiria, Salzburg, Hungary and Transylvania. America.—It occurs in syenite, near New-Yorkrin transition rocks on Rhode Island * ; an d in granite in Greenland. Asia.—At Thutskoi Noss. Africa. It is said to occur in rocks near the Cape of Good Hope. Uses. The finer kinds are first boiled in oil, and then cut irf- to tables or pencils : the coarser parts, and the refuse of the sawings, are melted with sulphur, and then cast into coarse pencils for carpenters; they are easily distinguish ed by their sulphureous smell. It is also used for bright ening and preserving grates and ovens from rust; and, on account of its greasy quality, for diminishing the friction in machines. Crucibles are made with it, which resist great degrees of heat, and have more tenacity and expansibility than those manufactured with the usual clay mixtures. 3. Mineral * Bruce’s Mineralogies! Journal, vol. i. p. 34Ji