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196 SULPHIDES. 5'95. Before the blowpipe emits a smell of sulphur and arsenic, and melts into a metallic globule, depositing a white and a red sublimate upon the charcoal. Analysis by Pfaif:— Lead 43-44, iron 0-16, copper 0-18, arsenic 3‘56, antimony 36-47, sul phur 17'20. Is found in fine-grained masses with towanite at Nertsehinsk in Siberia. 83. PLUMOSITE.—Antimoine sulfure capillaire; Hauy. Pedererz; Hausmann. Plumosit; Haidinger. Opaque. Lustre metallic, feeble. Blackish lead-grey...steel- grey. Sectile. h = 30. g = 5'7...6-9. / m Pb 2 Sb, lead 49'77, antimony 3roi, sulphur 19-22. Analyses of fibrous plumosite by H. Bose, of a massive variety by Poseleger, both from Wolfsberg:— Lead . . . . . 46-87 ' 48-48 Iron . . . . . 1-30 Zinc . . . . . 0-08 Antimony. . . . 31-04 32-98 Sulphur . . . . 19-72 20-32 Before the blowpipe melts easily, and is volatilized, with the exception of a small slag-like residue, depositing a sublimato of oxides of lead and antimony upon the charcoal. With soda yields a globule of lead. Is found in fine flexible and elastic acicular or capillary crystals in veins with antimonite, galena, &c. in the Harz, at Wolfsberg, Pfaffenberg, and Meiseberg near Neudorf. The substance known by the name of dark zundererz from the Catharina Neufang mine at Andreasberg, according to Bomtrager, consists of Silver 2 - 68 Lead 43-00 1 Iron 4 - 62 Antimony io - 88 Arsenic 12'60 Sulphur i9‘67 84. PLAGIONITE. — Plagionito ; Dufrenoy. Hemipris- matischer Dystom-Glanz ; Mohs. Plagionit; Ilausmaun, llai- dinger. Oblique. 101,100=64° 61; 111,010=71° l'-6 ; 101,001 = 17° 87'. a loo, c ooi, e in, # hi, n 221.