of the Pyrites. 351 



the flag or fcoriae -, nay moftly, or in an unknown 

 proportion, combines with the crude- fione^ as being 

 ever found to be irony. 



Now from what has been faid, we may form a 

 judgment of a crude-fmelting^ wherein fometimes 

 iron-ftone, fometimes real or corporal iron itfelf is 

 employed ; of which, among others Lohneifs 

 makes mention. It is true, we cannot with proper 

 grounds fpeak of fuch a method, if we are unac- 

 quainted with the whole dofe of additions, and with 

 the ore : as little will I affirm, that in fome cir- 

 cumfrances it may not hit; yet not be unattended 

 with great difficulties, not eafily furmountable. 

 Though thus much I fee from my own experience, 

 that iron very readily regulates or metallifes glit- 

 ter, as proving here the molt adapted feparant. 

 But (1) Our bufinefs, efpecially in the matter of 

 crude-workings is not with pure glitftr. (2) Should 

 the iron fupply the place of pyrites^ nay, have a 

 better effect, the ftony matters would remain un- 

 touched, as being to be fluxed by the fulphur, 

 which is in the pyrites, but not in the iron. And 

 laftly, we fhould confider how it affects the good- 

 nefs of the copper and lead. With the iron-ftone 

 to procure the principal end of the crude- workings 

 which confifts not only in feparation, but in (cori- 

 fication too, the more art is requifite ; in that this 

 lad, on the fcore of its incorporated ftubborn crude- 

 earth, and impurity, wants for itfelf the proper 

 aids and helps. Briefly, it holds quite otherwife 

 with the pyrites iron, than it does with fmelted 

 iron and iron-ftone. In the pyrites it is not only 

 adapted in a certain manner by nature, but be- 

 comes more fo in the courfe of the operation itfelf ; 

 turning to a fpongy, fubtle earth, both receptive, 



and 



