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28 HORNBLENDE FAMILY. Third Subspecies. .< i Glassy Tremolite. Glasartiger Tremolith, Werner. Glasartiger Tremolith, Eslner. b. ii. s. 907. Id. Emm. b. i. s. 429—Grammatite, Hauy, t. iii. p. 227.—La Tremolitho vitreuse, Brock, t. i. p. 516.—Glasartiger Tremolith, Reuss, v« b. i. th. 1. s. 193. Id. Lud. b. i. s. 145. Id. Suck. Ir th. s. 277- Id. Bert. s. 16.5. Id. Mohs, b. i. s. 393—Gramma- tite, Lucas, p. 77.—Glasartiger Tremolith, Leonhard, Tabel. s. 31. Tremolith, Hub. s. Cl.—Grammatite, Brans', t. i. p. 475. Id. Brard, p. 188.—Glasartiger Tremolith, Kurslcn t Tabel. s. 44. Id. Elaus. 97.—Amphibole Grammatite, Ilauy, Tabl. p. 40.—Glasartiger Tnmolith, Steffens, b. i. s. 294, Id. Lenz, b. ii. s. 694.—Glasartiger Grammatite, O/cen, b. i. s. 327. External Characters, Its colours are greyish, greenish, yellowish, and red dish-white. It occurs massive, and crystallised in acicular crystals. Its lustre is shining, but in a lower degree than the preceding subspecies, and intermediate between vitreous and pearly. • r l he fracture is straight, long, narrow, and scopiform radiated, with frequent parallel cross rents. The fragments are splintery. It occurs in distinct concretions, which are thick wedge-shaped columnar, including thin columnar. The latter are promiscuously arranged. It is translucent. It