PHYSIOGRAPHY. 



Cupreous Bismuth Cupreous Manganese. 



phur, yellow slag, which, on being heated with soda, yields metallic 

 copper. The powder is dissolved in nitric acid, with evolution of red 

 fumes, and the precipitation of sulphur and sulphate of lead. The solu- 

 tion affords with water a white precipitate of oxide of bismuth, or with 

 aulphuric acid, one of sulphate of lead. 



2. Analysis. 



By JOHX, By KLAPROTH, 



from Ecathcrineburg. from Baden. 



Sulphur . . . 11-58 16-3 



Bismuth . . . 43-20 . . 27-0 



Lead . . . 24-32 . . 33-0 



Copper . . . 12-10 . . 09 



Nickel . . . 1-58 . . 0-0 



Tellurium . . . 1'32 



Silver . . . 000 . . 15-0 



Iron . . . 0-00 . . 4-3 



8. It is. found in the mines of Pyschminskoi and Klutschefskoi in the 

 district of Ecatherineburg in Siberia, in Quartz, accompanied by Native 

 Gold and Galena. The variety analyzed by KLAPROTH occurs in 

 Quartz and Fluor, with Iron Pyrites, Copper Pyrites and Galena, at 

 Schapbach in Baden. 



APPENDIX TO CUPREOUS BISMUTH. 



i. Cupreous Sulphur et of Bismuth. 

 Crystalline in fibrous masses and capillary crystals. 

 Lustre metallic. Color light steeNgrey to tin-white. Streak 



white, 



1. Analysis. 



By KLAPROTH. 

 Sulphur .... 12-58 



Bismuth 47-24 



Copper . . . . . 34.66 



1. It occurs at Gallenbach in the principality of Farstenberg, in a dis- 

 integrated granite with Heavy Spar, Native Bismuth and Copper Py- 

 rites. 



CUPREOUS MANGANESE. Staphyline Man- 

 ganese-Ore. 



Small reniforra and botryoidal groupes, massive. Com- 

 position impalpable. Fracture imperfectly concboidal. 

 14* 



