MINERALOGY. 17* 



SECT. CLXVIIL 



Silver is found, 

 ji. Native or pure, Argcntum purum nativum. 



Native filver molt generally is nearly of 

 fixreen carats ftandard. 

 t. Thin fuperficial plated or leaved filver. 

 2. It is alfo found in form, 



a. Of fnag-grs, and coarie fibres. 



b. Of fine fibres. Capillary filver. 



c. Arborefcent. From Potofi in America, 

 and Kongfberg in Norway. 



d. Crifblline, or figured. This is very 

 fcarce to be met with : it has diftinct 

 figures, with fhining furfaccs \ it is, 

 however, fometimes found at Kongfberg. 



The filver from America is faid to be 

 found for the moft part native ; fo it is 

 like wife at Kongfberg in Norway, but 

 it is not commonly fo in the other Eu- 

 ropean mines. In Sweden it is found 

 native in a very fmall quantity, in the 

 mines of Salberg in Weftmanland, 

 of Lofafen in Dalarne, of HevafTwik 

 and Sladkierr in the province of Dal, 

 of Sunnerfkog in the province of Smo- 

 land, and in the Ifland Utoen in the 

 Lake Malaren. It was once found in 

 pretty large lumps in a vein of clay in 

 one of the iron mines at Normark, in 

 the province of Wermeland. It was 

 there mixed with nickel, which was 

 partly decayed or withered •, and under 

 this circumftance it formed the com- 

 pound ore called the S terras rfnferinum y 

 c* Goofe-dung Ore. At this place the 



ar-iiia* 



