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432 ZINC. lead-glance, copper-pyrites, iron-pyrites, grey copper- ore, and black silver-ore. Geographic Situation. It occurs in the Clifton lead mine, near Tyndrum in Perthshire ; in small veins along with galena, in the coal fields around Edinburgh ; at Cumberhead in Lanarkshire, along with galena or lead-glance; at Leadhills it is asso ciated with galena, white lead-ore, sulphate of lead, spar ry ironstone, iron-pyrites, brown hematite, azure copper- ore, electric calamine, and wad; the veinstones are quartz, lamellar heavy-spar, calcareous- spar, brown spar, and mountain-cork. It is met with in all the lead-mines in England and Wales. On the Continent of Europe it forms a constant attendant of galena or lead-glance, whether it occurs in veins or beds; and it maintains the same relation in the lead-mines of Asia, Africa and Ame rica. Second Sind. Fibrous Brown Blende. Fasrige Braune Blende, Werner. Hepatischcs Zinkerz, Wicdenmann, Min. s. 906.—Zink sulphurr compacte Broch. t. ii. p. 359—Schaalenblcnde, Reuss, b. iv. s. 34~. . Karstcn, label, s. 70. Id. Ilaus. Handb. b. i- s. 233—Fibrous Blende, Aikin, p. 56. External Characters. Its colour is reddish-brown. It