SILVER-WHITE COBALT-ORE. 501 Constituent Parts. Tunnabevg. Tunnabcrg. Cohalt, - 44.00 36.06 Arsenic, - 65.00 40 00 Sulphur, - 0.50 Iron, 6 50 1 5 66 99.50 k Klaproth, Ileit. b. ii. Tassaert in An- B- 307. nal. cl. Chim. xxviii. p. 82. Geognostic Situation. > It occurs in primitive rocks, partxularly in a quartzose mica-slate, and in gneiss, in imbedded masses, intermixed with the rock at their line of junction; also dissemina ted, and in imbedded crystals. It is associated with cop- per-pyrites, iron-pyrites, and r*d cobalt-ochie. Geographic Situation. 4 It occurs principally at Skntternd in the parish of Mo- dum in Norway ; at Tunnabcrg in Sweden ; and in small quantity at Queerbach in Silesia. Uses. *- This is the most common species of cobalt, and is that from which the cobalt of commerce is principally obtain ed. When roasted and melted in certain proportions with pounded quartz, it forms small, a compound which is highly useful in the manufacturing of porcelain and glass, and also for painting. The other species of cobalt are employed for similar purposes. I j 3 4. Cobalt-