350 'The Use s 



ftate * for infta<ice> in antimony) where there is 

 certainly no want of fulphur, it would not once 

 work in due manner on the rocky matters •, fmce 

 the fulphur in the antimony does not by far fo ea- 

 fi-ly feparate from its femi- metallic earth, or regu- 

 lus, as in the pyrites , from the iron- earth, and thus 

 would fail to exert a due degree of activity •, not to 

 lirention, that the fulphur fhould help to fcorify in 

 the manner the iron does. Befides, the iron has to 

 do with fomething more than the unmetallic earth, 

 namely the ory matters •, which laft cannot, or, at 

 lead, not fo well, be affirmed of fulphur *, namely ( i ) 

 The pyrites iron, under the direction of proper ad- 

 ditions, efpecially leady flags, aifo leady ores, helps 

 to make the ft one, corroded by the fulphur, fofc 

 and fluxile, and at the fame time becomes itfelf 

 foft and fluxile therewith, that is, a glafs or (lag. 

 And this proceeds (i) From the eafier terrification 

 of the pyrites and iron itfelf : but the terrification, 

 <)r reduction of metallic bodies to earth, is the 

 high way to their vitrification, and fcorification, is 

 a ipecies of vitrification. (2) By this means, the 

 good ore, difperfed and fpread abroad, and as it 

 were immured in the rock and earth, is fet free and 

 fitted for metallifation. (3) The iron, which be- 

 fore was a captive to, but now is releafed from the 

 fulphur, ftrikes the fulphur and arfenic out of the 

 ore ; nay fwallows them up, fo that the metal 

 is thereby freecjfrom thefe grofs impurities, or 

 precipitated, as a regulus out of antimony. All 

 which internal elaborations, marked under thefe 

 three heads, we are to fuppofe to happen inftan- 

 taneouily, or with a quicknefs equal to the violence 

 of the fire. But as -no feparation and precipitation 

 "happen without the feparant entering into the fe- 

 parund 5 fo he-re all the pyrites-iron goes not into 



the 



