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86 BASALT FAMILY. 2. It was first established as a distinct species by Wer ner. 3. A transition is to be observed from wacke into Basalt; also from wacke into Greenstone,—a fact which shews the near alliance of these minerals. 8. Clinkstone. Klingstein, Werner. Phonolith, Daubuisson. I lorn slate, Klrrv. vol. i. p. 307.—Porpbirschicfer, Eslner, b. ii. s. 747. Id. Emm. b. iii. s. 344.—Pierre sonnante, Brock. t. i. p. 437.—Klingstein, Klap. Beit. b. iii. s. 229- Id. Reuss, b. ii. s. 340. Id. Lud. b. i. s. 123. Id. Suck. l r th. s. 364. Id. Bert. s. 222. Id. Maks, b. i. s. 509. Id- Ilab. s. 16. Id. Leonhard, Tabel. s. 26.—Feldspath compactc sonore, Lucas, p. 266.—Klingstein, Karsten, Tabel. s. 38.—Clink stone, Kid, vol. ii. A pp. p. 18.—Klingstein, Steffens, b. i, s. 338. Id. Lenz, b. ii. s. 613, Id. Ohen, b. i. s. 363. External Characters. Its most frequent colour is greenish-grey, which some times passes into yellowish-grey, and ash-grey ; and oc casionally olive-green. It occurs massive. The lustre of the principal fracture is glistening and pearly; that of the cross fracture is faintly glimmering, almost dull. The principal fracture is slaty, generally thick, and often curved slaty, with a'scaly aspect; the cross fracture is splintery, passing into even. The