or ^ofcUtftOtt Of f frtttefft 9 



the fame things that make a body 

 Firm y give it fome degree of Fixity j 

 by keeping it from being diffipated 

 by the wonted degrees of Heat, and 

 Agitation it meets with in the Air* 

 But to return to the contaft we were 

 (peaking of, I think it not impoffible* 

 ^though you may perhaps think it 

 ftrange.) that the bare operation of 

 the Fire may, in fome cafes., procure 

 a Cohejion among the particles 5 (and 

 confequently make them more Fixt,} 

 as well as in others disjoyn them 5 and 

 thereby make them more Volatile. 

 For 5 as in fome bodies 3 the figures and 

 (izes of the corpufcles may be fuch 5 

 that the a&ion of the fire may rub 

 or tear off the little beards or hooks, 

 or other particles that intangle them* 

 and by that means make it more eafie 

 for the corpufcles to be disingaged 

 and fly upwards 5 fo in other bodies* 

 the fize and fhape of the corpufcles 

 may be fucb^ that the agitation^ cau- 

 fed by the fire, may rub them one 

 againft the other, fo as by mutual at- 

 trition to grind^ as 'twere> their 



for- 



