fire at all, in the form of Spirits., ex- 

 ceeding unquiet, fubtle, and apt to 

 moak away. 



To which Inftances of this imper- 

 fed kind of Volatilization more 

 might be added, but that you may 

 well think, 1 have detain'd you but 

 too long already with indigefted 

 Notes about one Quality* 



CHAP. VII. 



THe laft means of Volatilizing 

 bodies is., the operation of the 

 Fire or fome other adtual Heat : But 

 of this, which is obvious., it would 

 be fuperfluous to difcourfe. Onely 

 this I fhall intimate, that there may 

 be bodies, which, in fuch degrees of 

 fire as are wont to be given in the 

 vulgar operations of Chymifts, will 

 not be elevated, which yet may be 

 forced up by fuch violent and lading 

 fires, as are employed by the Melters 

 of Ores, and Founders of Guns, and 

 fometimes by Glafs-makers. And on 



this 



