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268 BARYTE FAMILY. Observations. It is distinguished from Heavy-spar, by its dissolving in nitrous acid ; from Celesline, by the same property. 2. Heavy-Spar. Schwcrspath, Werner. This species is divided into eight subspecies, viz. Earthy Ileavy-Spar or Heavy-Spar Earth, Compact Heavy-Spar, Granular Ileavy-Spar, Lamellar Heavy-Spar, l-'ibroiis Heavy-Spar, Radiated Heavy-Spar or Bolognese Spar, and Prismatic Ileavy-Spar. First Subspecies. Earthy Heavy-Spar, or Heavy-Spar Earth. Schwerspath Erde, Werner. Baryta vitriolee terrcusc, De Bom, t. i. p. 268 Schwcrspath- eide, Uu!. s. 558.—Earthy Baroselenitc, Kiriv. vol. i. p. 138- —Schwerspath-erde, Eslner, b. ii. s. 1143. Id. Emm. b. >• s. 550.—Baryta vitriolata terrea, Nap. p. 402 I.c spath p» sant tcrreux, Brock, t. i. p. 617*——Erdiger Baryt, Bcuss» b. ii. 2. s. 437. Id. I.ud. I,, i. s . 168. Id. Suck. lr tli. s. 6.97- Id. Bert. s. 122.—Barytcrde, Mohs, b. ii. s. 106.—ErdigC Baryt, Beonhard, "1 abel. s. 39.—Bafyte sulphatce tcrrctiX, Brong. t. i. p. 252.—Erdiger Baryt, Ilaus. s. 134. Id. Fur- slen, Tabel. s. 54.—Earthy Sulphate of Baryt, Kid, vol. >• p. 87-—Barytcrde, Lenz, b. ii. s. 389. External Characters. Its colours are snow, greyish, yellowish, and reddish white i *
