32 fl)f t^e ^ecljanical ^igtne 



to be : And divers bodies^ that are 

 thought either altogether unfit for 

 Sublimation, or at leaft uncapable to 

 have any confiderable portion of 

 them elevated., may be copioufly e- 

 nough fublimed^ if a greater propor- 

 tion of the additament, than we ufual- 

 ly content our felves with, be skil- 

 fully imployed. And in the new- 

 ly-mentioned Inftance of Filings 

 of Steel , if 5 in ftead of an equal 

 weight of Sal Armoniac^ the treble 

 weight be taken, and the operation 

 be duly managed^ a far greater quan- 

 tity of the metall may be raifed^ efpe- 

 cially if frefh Sal Armoniac be care- 

 fully ground with the Caput Mortuum. 

 And Sal Armoniac may perhaps be 

 compounded with fuch other bodies*, 

 heavier than it felf, as may qualifie it, 

 when it is thus clogged, to elevate 

 fome congruous bodies better than 

 it would of it felf alone. And I 

 (hall venture to add this farther Ad- 

 vertifement, That if,befides the plen- 

 ty of the additament, there be a fuf- 

 ficient fitnefs of its particles to lay 



hold 



