and J&oDutfton of ftolatilttp* 23 



tals again, which he had in vain at- 

 tempted to doe: whereupon, though 

 I found the white Calx of Lead re- 

 duc'ible 5 yet when I came to the Calx 

 of Silver, I was not able to bring it 

 into a body 5 and having at length 

 melted fome Lead in a gentle fire, to 

 try whether I could make it fwallow 

 up the Calx in order to a farther o- 

 peration, I was not a little furprized 

 to find} that this mild heat made the 

 Calx of Silver prefently fly away and 

 fublime in the form of a farina volati* 

 lis^ which whitened the neighbouring 

 part of the Chimney, as well as the 

 upper part of the Crucible. 



4. From that which Chymifts 

 themfelves tell us, I think we may 

 draw a good Argument ad hominem % 

 to prove, that Volatility depends 

 much upon the texture and- other 

 Mechanical affe&ionsof a body. For 

 divers of thofe Hermetick Philofo 

 phers (as they are called) that write 

 of the Elixir^ tell us, that when their 

 Philofophick Mercury or grand Sol- 

 vent, being fealed up together with a 

 B 4 third 



