of the P yr it e s. 33 



not lb beautiful a fmalt or blue colour, as the 

 other. 



The white gcldijlo ore, to which may alfo be re- 

 feree! the white ore, the fallow ore, and the fallow- 

 copper-ore, in colour almofl refembles the fine co- 

 bald, only fmoottier and thus more gliftering, and 

 with the greater! difficulty diftinguifhable from 

 the white-pyrites. Hie white ore, which at the 

 Hailebruke is ufually called a rich copper ere, 

 tho* far fhort of the wBite-goldiJb in goodnefs, is 

 only a ore. Fallow-ore, which is a grey 



lil very copper ore, and fallow copper-ore, which 

 is a copper- ore poorer in filver and richer in copper, 

 are generally darker than the white-goldifh ore, the 

 faUou --ore being the darkeft of all, whence 



it is eafily known from the white pyrites, 

 provided you can rightly diftinguifh it from the 

 cobald, particularly the fecond fort, and from the 

 white-go'diih ore. There is a kind of antimony- 

 ore from Schlaitz in the Voigtland, often fo little 

 radiated, as fcarcely to be efteemed an ore of that 

 kind, yet of fo dark a grey, as never to be con- 

 folio :h the white pyrites, the white goldiflo, 

 the cobald and the fallow ore. To range the ores, 

 hitherto mentioned, by the feveral degrees of their 



liter and darker caits, and to begin with the 

 lighted, they (land thus : Firft, the white pyrites, 

 then the cobald of the fecond fort, next the fine 

 cobald, then the wh\te-goldilh ore, the white -ore, 

 the fal. and fallow copper ore. A per fori, 



not carefully comparing together and accurately 

 examining thefe ores, may ea(ily miftake, but a 

 pen xperience can dire&ly upon fight dif- 



ut the troul ' - oi comparing them ; 

 and al differences, which may afford 



iertbmal liftinction 



. At leaft the arfenic-pyrites does, 



in : ) the yellowifli, or fitlphur -pyrites } and 



