SLATE-SPAR. 117 It is easily frangible. It feels rather greasy. Specific gravity, 2.647, Kirwan. 2.474, Blumenlach. 2.6300, La Metherie. Chemical Characters. It effervesces very violently with acids; hut is infusible before the blowpipe. Constituent Parts. From Brem*griin. From Kongsberg. Lime, - 55.00 Lime, - 56.00 Carbonic Acid, 41.66 Carbonic Acid, 39.33 Oxide of Manganese, 3.00 Silica, - 1.66 Oxide of Iron, 1.00 Bucholz. Water, - 2.00 Suersee. Geognostic Situation. * It occurs in primitive limestone, along with calcareous- ®par, brown-spar, fluor-spar, and galena; in metalliferous beds, associated with magnetic ironstone, galena, and hlende; and in veins, along with tinstone. I — Geographic Situation. It occurs in Glen Tilt, Perthshire; and Assynt in Sutherland, in marble : in Cornwall; and near Granard Ireland *. On the Continent, it is found along with tinstone, in the Saxon Erzgebirge; along with octahe- drite, in a vein at St Christophe in Dauphiny; also in Norway, in metalliferous beds, and in limestone. II 3 Observations. * Greenough.
