i4 S>f tt»e ^ec^antcal dDtffftne 



And here I obferve, that in fome bo* 

 dies this comminution ought not tp 

 be made onely at firft, but to be con- 

 tinued afterwards. For Chymifts find 

 by experience, though perhaps with* 

 put confidering the reafon of it 5 that 

 Sea-falt and Nitre, will very hardly 

 afford their Spirits in Diftillations, 

 without they be mingled with pow- 

 dered clay or bole, or fome fuch o- 

 ther additament, which ufually twice 

 or thrice exceeds the weight of the 

 Salt it felf : Although thefe addita- 

 ments, being themfelves fixt, feem 

 unlikely to promote the volatiliza- 

 tion of the bodies mixt with them, 

 yet by hindering the fmall grains of 

 Salt to melt together into one lump 

 or made, and confequently by keep- 

 ing them in the ftate of Comminuti- 

 on^they much conduce to the driving 

 up of the Spirits or the finer parts of 

 the Salts by the operation of the 

 fire. 



But to profecute a little what I 

 was faying of the Conducivenefs of 

 bringing a body into fmall parts to 



the 



