Silver. 247 



tended to the divifion of ores moft exactly. 

 According to him this ore is a hard fubftance, 

 of a white, fhining appearance, and of a 

 compacl, lamellar or fibrous texture; the 

 brighteft is the pooreft in filver; the richeft 

 gives only 10 per cent, the pooreft 6 or 8 

 ounces : it contains no fulphur ; and hence 

 Mr. Monnet calls it a metallic regulus, not 

 confidermg that the iron is in a calcined ftate, 

 which fully proves that arfenic is a true mi- 

 neralizer: the iron and arfenic are in various 

 proportions, but the arfenic always exceeds. 



It is fouad in Saxony, the Hartz, at t^ua- 

 danal-Canal) &c. 



1 8. It is eflayed in the moift way, as in 



N p - 4 . 



SPECIES VIII. 



Mineralized by Arfenic and Sulphur, ivith a 

 fmall Proportion of Copper, and a Jiill 

 fmaller of Iron. 



White Silver Ore y Weifsgulden. 



19. It is a heavy, foft, opake fubftance, 

 fine grained or fcaly, bright and fhining in 

 its fra6ltires, of a whitifh, fteely or lead co- 

 lour, fometimes cryftalized in pyramidical or 

 cylindrical forms, but often in amorphous 

 grajns, or refembling rnofs, or in the form of 



R 4 thin 



