Nickel. 343 



mixed with calx of iron, fcattered over the 

 ore of kupfernickel ; alfo in fome greea 

 clays. Cronft. . 255. 



SPECIES III. 



Mineralized by the Vitriolic Acid. 

 Vitriol of Nickel. 



4. Already mentioned in the 2d Part* 

 p. 195. 



SPECIES IV. 



Mineralized by Sulphur and Arfenic^ imth C<r 

 bait and Iron. 



Kupfernickel. 



5. This is of a reddifh yellow bright co- 

 lour ; its texture either uniform, granular or 

 Icaly, bright in its fradture, very heavy, and 

 generally covered with agreenifh efflorefcence; 

 by calcination it lofes much of its fulphur, 

 and becomes green, forming fungous rami- 

 fications. 



6. Its analyfis in the moift way is as yet 

 very imperfed: ; by folution in the nitrous 

 acid it is freed from its fulphur, and by ad- 

 ding water to the folution, bifmuth, if any, 

 may be precipitated, as may filver if con- 



Z 4 tained 



