£14 Of the Silver, &c. 



but happen to be furnifhed with only fuch as is ad- 

 ventitious and foreign. The fame judgment we 

 ought to pafs on the Latin appellations, pyrites ar- 

 genteus, or argentarius, as taken either from the 

 colour, and denoting the fame as -pyrites argentei 

 colons, and thus only a white pyrites , of which in 

 the preceding chapter : or, from its holding filver 

 only without any other metal, as * Ridandus affirms ; 

 whence it mould rather have fome other name than 

 that of pyrites. After all, fo little filver is to be 

 expected from pyrites, that were not the fulphur- 

 pyrites ferviceable for making the crude-ftone, or 

 for fulphur and vitriol ^ and the copper-pyrites fer- 

 viceable for copper, it would not be worth while 

 to dig for and fmelt them, 



* Lex. page 390. 





CHAP. 



