134 Of the Sulphur 



white and green lead ores •, but to find quickfilver- 

 ore and regulus without fulphur, would be a pro- 

 digy in nature. 



Sulphur is more frequently found with the ig- 

 noble, rather than with the nobler metals, in their ore- 

 ftate, and with it, fometimes, arfenic is combined 

 in larger or fmaller quantities ; a circumftance not 

 to be affirmed either of quickfilver, or regulus. 



Iron and copper, as well as quickfilver and re- 

 gulus, greatly affeft. fulphur, which, when without all 

 other metals, is never without both thefe lad: -, and in 

 the former too in fo large a quantity as in the often 

 mentioned metallic middle jubilances, or eleflra. 

 In a word, fulphur reduces iron and copper to an 

 ore-ftate, and forms them into pyrites •, yet not al- 

 ways in the fame manner, or proportion. 



As to the white pyrites, I, for a long time, doubt- 

 ed whether it contained any fulphur , 'till a perfon, 

 employed in the manufactures of fulphur and fan- 

 darach, would, right or wrong, periuade me, that 

 a fandarach might be made from white pyrites, with- 

 out additions \ whence it follows, that it mud ne- 

 ceflfarily contain fulphur 3 without which no fanda- 

 rach can be prepared. But to omit mentioning 

 now, that I never could difcover any by my repeat- 

 ed proofs, I found it to be a bare alkrtion, with- 

 out any foundation \ a thing but too common, both 

 at the mines and huts. I cannot, however, deny 

 to the white pyrites (though entirely clofe as (feel, 

 pure, and without any obfervably interceded Jul- 

 ^hur pyrites) any the lead matter of fulphur. 



In copper pyrites, as that holding bu: little copper, 

 is thus called at Friberg ; and eopper-pyrites-ore, (by 



which 



