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178 SULPHIDES. age. c, b, tolerably perfect; n, on, a, less distinct. I, traces. Fracture conchoidal. Semi-transparent...translucent. Lustre resinous, b = 2-649. Aurora red. Streak orange-yellow. Sectile. h = 1'5. G = 3'656. In the matrass sublimes. The sublimate is dark yellow, and transparent, sometimes red. In the open tube burns, deposit ing a sublimate of arsenious acid. Before the blowpipe on charcoal melts and bums with a yellowish-white flame. Soluble with difficulty in acids. In hot nitromuriatie acid dissolves slowly, leaving a residue of sulphur. In warm caustic potash is changed into a dark powder. AsS 2 , arsenic 70'07, sulphur 29’93. Analyses by Klaproth and Laugier:— Arsenic .... es-o 69-57 Sulphur .... 30-5 30-43 In attached crystals and druses, massive, disseminated and investing other minerals. Is found in veins with arsenic, antimonite, pyrargyrite, blende, galena, pyrite, mispickel, &c., in veins at Kapnik and Kagyag in Transylvania, Felsdbanya in Hungary, Joachimsthal in Bohemia, Sehneeberg in Saxony, Andreasberg and Wolfs- berg in the Harz, Markirehen in Alsace, Wittichen in Baden ; in beds of clay at Tajowa in Hungary ; in beds of dolomito on St. Gotthardt; in limestone at Kranabit; in gypsum at Hall in the Tyrol; in Peru; in the United States; as a product of sublimation in Vesuvius and iEtna, Kiusiu in Japan. 66. CIWABAR.—Cinnabar; Phillips. Mercure sulfure ; Hauy. Peritome Eubin-Blende; Mohs. Ziunobcr; Haus- mann, Ilaidinger. Rhomboliedral. ioo,m = 09° 17'. o ill, b 211, e on, r 100, u 211, x 311, * 522. PIG. 176. bl" 60° O' mm' 57° 4' uo 33 28 ee 87 24 zo 41 24 ue 43 42 xo 46 36 zz' 69 54 ro 69 17 xx' 78 2 bo 90 0 rr' 108 12 eo 52 64 er’ 54 6 Combinations, oh, ouzr, ozrb, ouzxerb. The faces u, z, x, e