240 Elements of Mineralogy, 



CHAR III. 



Silver. 



1. Silver is the whiteft of all metals ; its fpe- 

 cific gravity when pure is 1 1*095 ; it is foluble 

 in the concentrated vitriolic acid with the af- 

 fiftance of heat, and in the moderately dilute 

 nitrous acid without that affiftance ; it is pre- 

 cipitable from both by the marine, and from 

 the nitrous in great meafure by the vitriolic ; 

 its calces are reducible without the addition of 

 any phlogiftic matter, and it is incapable of 

 calcination by mere heat. 



SPECIES I. 



/ 



Native. 



2. Native filver is found in a granular, 

 lamellar, filamentous, capillary, arborefcent, 

 or cryftalized form, inhering either in baro- 

 felenite, lime-ftone, felenite, quartz, chert, 

 flint, ferpentine, gneifs, agate, mica, calca- 

 reous fpar, pyrites, ihiftus, clay, &c. alfo in 

 feparate mafles of various fizes, fome of the 

 weight of 60 pounds, in or near the veins of 

 moft metallic fubftances, particularly in Peru* 

 and frequently in various parts of Europe, 

 either of a white, brown, or yellowifh 

 colour. 



