Gold. 237 



SPECIES V. 



Mixed 'With afulphurated Ore of Siher, fron y 

 Lead, and Manganefe. 



15. Lately found at Nagaya in Tranfyl- 

 vania. This ore confifts of fmall dark co- 

 loured plates of more or lefs brightness, in- 

 hering in quartz, and a foft whitifh fubftance, 

 which Mr. Bergman found to be manganefe. 

 Part of the gold may be extracted from it 

 by eliquation in a cuppelling heat, its fufi- 

 bility being promoted by the lead. 



1 6. If the dark coloured plates be feparated 

 from the remaining mafs, and treated with 

 aqua regia, the gold and iron will be ex- 

 tra6led, and may be feparated as above menti- 

 oned, N? 7. but none can be extracted by 

 amalgamation, ScopoL An. 3. p. 90. 



17. This ore is faid to afford 10 ounces 

 of gold per quintal, befides filver, its fpecific 

 gravity according to Gdlert^ is 4,043. 



SPECIES VI. 



Mixed *with fulphur ated Iron and Copper ', with 

 Manganefe. 



18. This is a yellow pyrites, found alfo at 



in which gold is contained ; Mr. 



Bindhiini 



