MINERAL CHARCOAL. 401 Mineral Charcoal. Mineralische Holzkohle, Werner. • Mineralische. Holzkohle, Leonhard, Tabc]. s.- 50.—Fasriger Anthracit, Karstcn, Tabel. s. 58. Id. Ilaus. s. 115. Id. Lenz, b. ii. s. 1082. External Characters. Its colour is dark greyish-black, which sometimes ap proaches to bluish-black. It occurs massive, disseminated, in flattened roundish pieces, and crusts. , ! ' *n It is glimmering, bordering on glistening, and the lustre is silky. The fracture is fibrous which sometimes shews the woody texture. The fragments are indeterminate angular, blunt-edged > Sometimes also splintery. It soils strongly. r * 5 r n) It is soft, passing into friable. . . n It is very easily frangible, • ’ \ I v It is light. , , Chemical Characters. When exposed to a strong heat, it burns without flame «r smoke. .... Geognostic and Geographic Situations. .It occurs in thin layers in slate-coal, brown-coal, carth- c °al and ntoor-coal, in countries where these coals abound. II. C c IV, RESIN
