fRIAELE BLACK MANGANESE-ORE. First Subspecies. Friable Black Manganese-Ore. Zerreibliches Schwarz Braunsteinerz, Kars ten. Zerreibliches Schwarzbraunsteinerz, Reuss, b. iv. s. 459- Id. Kars ten, Tabel. s. 72.—Zerreibliches Schwarzmanganerz, Haus. s. 109.—Manganese oxyde noire brunatre pulverulent, Haup, Tabl. p. 110. (in part).—Ochriger Schwarz Braun- steinciz, Haus. Handb. b. i. s. 294. External Characters. Its colour is brownish-black. It occurs fruticose, in crusts, and in imbedded roundish kidneys. It is dull, or glimmering and resinous. The fracture is earthy. It occurs in curved lamellar concretions. It is very soft, passing into friable. It soils slightly. It is light. Geognoslic and Geographic Situations. , It occurs along with grey manganese-ore, compact black ironstone, and lithomarge. The fruticose variety is found *t Schmalkalden ; and the imbedded roundish kidneys in snow-white lithomarge at Johanngcorgenstadt. It is al io met with at Ilefeld. Second