342 Elements of Mineralogy. 



.blue, but iron difcovers no copper in them, 

 as it does in every combination of copper^ 

 fulphur, iron, arfenic and cobalt. Hence 

 nickel muft be deemed a diftincl: femi-metal : 

 befides, Mr. Bergman has ihewn that ful- 

 phur, arfenic and cobalt may be perfectly fe- 

 parated from it, though perhaps iron cannot ; 

 but it feems to me very probable that nickel 

 itfelf may be magnetic : the pureft regulus is 

 ityuch more difficultly calcined or melted. 



SPECIES I. 

 Native. 



2. This is mentioned by Mr. Rinman to 

 have been lately found in a mine of cobalt in 

 Hejje ; it is very heavy, and of a liver colour, 

 that is, dark red ; when pulverized and roaft- 

 ed under a muffle, it forms green excrefcences, 

 and fmokes, but its fmoke has no particular 

 fmell, and no fublirnate, whether fulphureoits 

 or arfenical, can be caught ; it is ibluble in 

 'acids, and the folution is green ; but a po- 

 lifhed iron plate difcovers no copper. 



SPECIES II. 



Mineralized by the aerial Acid. 

 Native Calx of Nickel. 



3. It is found in the form of a green calx, 



mixed 



