NATIVE MAGNESIA. 481 Constituent Parts. Magnesia, . > 70 Water of crystallization, 30 100 Bruce, American Min. Journal, vol. i. p. 30. Geognostic and Geographic Situations. It occurs in small veins in serpentine, at Hoboken in New Jersey. - » Observations. It was discovered by Dr llruce, Professor of Mine ralogy in New York. 2. Magnesite. Iteine oder Natiirliche Talkerde, Werner. Magnesic native, Broch. t. ii. p. 4-99-—Iteine Talkerde, Reus b. ii. s. 223. Id. Lud. b. i. s. 154. Id. Suck, lr th. s. 539- Luftsaure Bittererde, Bert. s. 136.—Iteine Talkerde, Molts, b. i. s. 528. Id. Ilab. s. 68. Id. Leonhard, Tabel. s. 27.— Magnesite de Mitchell, Brong. t. i. p.490.—Magnesit, Karsten, Tabel. s. 48.—Magnesie carbonatee, Hatty, Tabl. p. 16.— Magnesit, Steffens, b. i. s. 243. Id. Lenz, b. ii. s. 631. Id. Okcn, b. i. s. 386. External Characters. Its colour is yellowish-grey or yellowish-white^ passing lnto cream-yellow. It is marked with yellowish and Vol. I. II h ash-