t 7 6 A SYSTEM OF 



a. Of a metallic changeable colour. 

 i. Solid, and with fine fcales. 



2. In form of balls. The Kugel-ertZi 

 or ball ore. 



It is found at Schemnitz, and con- 

 tains alfo gold. Its yield of filver is 

 twenty-four ounces per cent, and 

 thirty per cent, of zink. 



b. Black mock lead* or blende, found in 

 Saxony. This is alfo found, 



i. Solid, and with fine fcales 5 

 2. And in forrri of balls. 



SECT. CLXXVI. 



8. With fulphurated lead, Potter's ore, Ga- 

 lena, Bleyglanz. See Sc£t. clxxxviii. 



9. With fulphurated lead and antimony, 

 called Striperz. u See Se6t. cxc. 



20. With fulphurated iron, Argentum ferro 

 fulphurato miner alifatum. Silberhaitiger kies y 

 Marcafite holding filver. 



At Kongfberg in Norway, it is faid, a 

 liver-coloured marcafite is often found, 

 particularly at the mine called Fraulein 

 Chriftiana, &c. This marcafite contains 

 of filver from three to three ounces and an 

 half per cent. 



SECT. CLXXVII. 



ti. With the acid of common fait, Argentum 

 acido falls folutum & miner all fat um. Miner a 

 argenti cornea. Hefner tz, or horn filver ore. 

 This is the fcarceft filver ore ± it is of 

 a white or pearl colour, changeable or 

 varying on the furface, femi-tranfparent, 



and 



