Regulus of Antimony, 325 



Dr. Schwab^ in the year 1748 ; it was cora- 

 pofed of fhining white irregular planes or 

 facettes, refembling Mifpickel, for which k 

 was long taken, and in effect contained a 

 mixture of arfenic ; it has alfo been lately 

 found in the mines of Allemond in France by 

 Mr. Mongez the younger, alloyed with about 

 3 per cent, of arfenic. 23 Roz. 66. 



3. Its purity may be examined by boiling 

 it in a large quantity of nitrous acid, which 

 will hold only the arfenic in folution. 



SPECIES II. 



Mineralized by the aerial Acid. 

 Native Calx of Antimony. 



4. This was alfo lately difcovered by Mr. 

 Mongez ; it confifts of a group of white cryf- 

 talized filaments diverging from a common 

 center like zeolyte ; urged with a blow pipe 

 on charcoal it will cjiffipate, which, together 

 with its infolubility in nitrcnjs acid, is fuffi- 

 deqt to diftinguifh it. 



SPECIES III, 



Mineralized by Sulphur. 



Antimony. 



5. Its colour is dark, or bluifh grey ; its 



Y 3 texture 



