(48 ) 

 Black ore loofe 75 fulphur and pyrites, ancf 



25 filver at moil. 

 Arfenico-martial ore from 90 to 99 iron, 



and arfenic, and from 10 to i of filver. 

 White ore from 70 to 90 of fulphu rated 



copper, arfenic, and iron, and from 10 to 



30 of filver. 

 Grey ore from 12 to 24 of copper, from i 



to 12 of filver, and the remainder ful- 

 phur, arfenic, and a little iron. 

 Brown ore moftly copper, fulphur, arfenic, 



a little regulus of antimony and iron, and 

 ' from i to 5 percent, of filver. 

 Plumofe ore pyrites, arfenic, antimony, and 



about i per cent, of filver. 

 Cobaltic ore fulphur, arfenic, cobalt, iron, 



and from 40 to 50 per cent, of filver. 

 Vitriolic and marine filler about 70 of filver. 



i oo Parts. Copper. 



Red calx of copper 26 fixed air, i water, 



73 copper. 

 Bro r wnijh red pyrites, and from 20 to 50 of 



copper. 

 Malachite 29 aerial acid and water, and 71 



of copper. 

 Mountain green 22 aerial acid, 6 water, and 



72 of copper. 

 Mountain blue 29 aerial acid, 2 water, and 



69 of copper. 



Vitreous 



