i 9 o A SYSTEM Of 



SECT. CXCIII. 



Copper is found in the earth* 

 A. Native, or in a metallic ftate \ Virgin or na- 

 tive copper, Cuprum nativurn. 

 i. Solid, Solidum, is found in the iron mine 

 of Hefslekulla, in the province of Nerike* 

 and at Sunnerfkog, in the province of Smo- 

 landj alfo in the Ruffian Carelia, and in 

 other foreign places * 

 2. Friable, in form of fmall, and fomewhat 

 coherent grains, Cuprum nativurn particulis 

 conglomeratis diftintlis. Precipitated or Zi- 

 ment Copper. It is found at Riddarfhyttan 

 in Weftmanland, at Fahlun in Dalarne, 

 and in Plungary. 



It has been obferved, that both copper 

 and filver glafs ore, being precipitated from 

 water, become friable and granulated, but 

 that they in time grow folid and ductile : 

 whence the difpute about the diftinclion 

 between native and precipitated copper 

 may ceafe, the rather as native copper will 

 fcarcely be found in other places, and in 

 any other kinds of ftones, than through 

 which the ziment or vitriolic waters have 

 circulated * altho' the fifTures thro' which 

 it has run may afterwards be filled with a 

 ftony fubftance. 



SECT. CXCIV. 



JS. In form of a calx, Miner a cupri calciformiSk 

 l. Pure, Miner a cupri calciformis pur a. 

 a, Loofe or friable, Ochra veneris. 

 i. Blue, Ccerukum montanum* 



Is 



