20 hornblende family. 2. Hauy is of opinion, that Actynolite and Hornblende belong to the same species, because his observations shew an identity in their primitive forms. Count de Bournon, on the contrary, proves that their primitive forms are not the same; hence, he infers that they are distinct species. These two minerals are further distinguished by their colour, fracture, crystallizations: the crystal lizations of actynolite being few in number, and simple; whereas those of hornblende are more numerous, and complex; and, lastly, they differ remarkably in geognos tic situation. 3. The fibrous varieties of glassy actynolite have been confounded with Amianthus; but they are distinguished from it by lustre, cross rents, and the rough feel of their powder. Fourth Subspecies. Granular Actynolite. Kdrniger Strahlstein, Werner. Korniger Strahlstein, Karslen, Tabel. n. 42. s. 91. Id. Steffens, b. i. s. 289. Id. Lenz, b. ii. s. 688. Id. Oken, b. i. s. 322. External Characters. Its colour is grass-green. It occurs massive. Internally its lustre is shining and vitreous. The principal fracture is imperfect foliated, with a twofold cleavage : the cross fracture is splintery. It occurs in large, coarse, and small granular distinct concretions.. It o