atid^olJUttiottoftKolatilttp. 41 



and the third time than the fecond, 

 and fo onwards* yet I have not found 

 this Rule alwayes to hold, but in 

 fome Bodies, as particularly in fome 

 kinds of dulcified Cqlcothar, the Sal 

 Armofciac, would at the firft Sublima- 

 tion carry up rnore of the fixed pow- 

 der, than at the fecond or third. So 

 that 1 lyas by feveral Tryalls per- 

 fwaded, when I found a very well 

 and highly coloured powder eleva- 

 ted ? to lay it by for ufe, and thereby 

 fave my felf the labour of a profe- 

 cution 3 that would not onely have 

 proved ufelefe, but prejudicial. And 

 if I mifremember not, by often re- 

 peated Cohobations, (if I may fo call 

 them) of Sal Armoniac upon crude 

 or Mineral Antimony though the 

 Sublimate that was obtained by the 

 firft Operation., was much of it vari- 

 ouily, and in fome places richly, co- 

 loured} yet afterwards^ the Salt a- 

 fcended from time to time paler and 

 paler, leaving the Antimony behind 

 it* Which way of making fome 

 Minerals more fixt and fufible I con- 

 ceive 



