194 Elements of Mineralogy. 



318, but that in common ufc is moftly pre- 

 pared at Gojlaar from an ore which contains 

 zinc, copper, and lead, mineralized by ful- 

 phur and a little iron - y the copper ore is firft 

 Separated as much as poflible, and the refi- 

 duum after torrefaftion and diftillation is 

 thrown red hot into water and lixiviated. 

 Schlutt) 639, 3 Jars, 320, it is never free 

 from iron. 



The vitriols of copper, iron, and zinc, are 

 according to Mr. Cronfted* frequently found 

 mixed in the waters pumped out of mines, 

 fometimesall three are found cryftalized in 

 lumps of a yellow colour; the vitriol of Fahlun 

 in Sweden, contains all three, Bergm. Sciagr. 

 82. 



SPECIES XL 

 Vitriol of Cobalt. 



It is difficultly foluble in water, and both 

 it and its folution are red, which fufficiently 

 diftinguifhes its bafis ; its acid is known by 

 the fame tefts as that of the former vitriols. 



It is faid to be found native in fmall pieces, 

 mixed with a greenifh efflorefcence in cobalt 

 mines, Born, Index, Foff. 51. 



Hahtrhhium 



