In the Pyrites. 109 



quintals of iron and antimony, four quintals 



of martial regulus of antimony. 



A fecond proof for the univerfality of iron in ppj 

 , we have from antimony, feeing on the pyrites 

 the fulphur or the antimony is equally confumed, as 

 on forged iron -, depofumg, efpecially with the ad- 

 dition of proper falts, the regulus, lb far forth as 

 the pulverized ftate, to which the pyrites-iron muft, 

 by the deiulphu ration, be reduced, will permit : 

 ib that the very few pyrites wherein the copper 

 entirely predominates, cannot reafonably be fup- 

 pofed to affect our proof, as the exigence of fuch 

 an iron metal-earch feldom can be denied. 



A third proof we have from the vitriolifation of 

 pyrites; all pyrites giving forth a vitriol, as tney 

 all hold a fulphur, excepting the mifspickel, when 

 pure and unmixed with other pyrites. All forts of 

 vitriol, whether native or factitious, are either 

 purely martial, purely coppery, or confiding of 

 both : the firft is of a fea-green call, and fweetifh 

 tafte-, the fecond blue, and tailing iharp and nau- 

 fcous; the third, wherein the martial predomi- 

 nates, may conceal its coppery naufeous admixture 

 from the fight, though not from the tafte. In 

 fhort, all vitriols confift (1.) of the ftrongeft mi- 

 neral acid, which comes either from fulphur, or 

 the air : [%.) of a metallic earth, which is always 

 either iron or copper, or both together, though in 

 different proportions-, whence all the vitriols, as 

 they are called, from fiiver, lead, &c. made by 

 means of aqua fortis, vinegar, &c, cannot be 

 clafled with the abovementioned. As to pure cop- 

 pery vitriol, it will be a hard matter to find any 

 h ; for though the cement waters, as they are 

 called, or, properly, the copper-waters of Hun- 

 gary, 



