The Qualifications that conduce 

 moft to the Fixity of a portion of mat- 

 ter, feem to be thefe* 



Firjij thegrofsnefs or the bulk of 

 the corpufcles it confifts of. For if 

 thefe be too big, they will be too 

 unwieldy and unapt to be carried up 

 into the Air by the a&ion of fuch mi* 

 nute particles as thdle of the Fire, 

 and will alfo be unfit to be buoyed 

 up by the weight of the Air 3 as we 

 fee,that Vapours^whilft they are fuch, 

 are fmall enough to fwim in the Air, 

 but can no longer be fuftained by it, 

 when they convene into drops of raia 

 or flakes of fnow. But here it is to 

 be obferved, that when I fpeak of the 

 corpufcles that a fixt body confifts of, 

 I mean not either its Elementary or 

 its Hypoftatical Principles, as fuch, 

 but onely thofe very little maffes or 

 clufters of particles^ of what kind fo- 

 etfer they be, that ftick fo firmly to 

 one another 3 as not to be divifible 

 and diffipable by that degree of fire 

 in which the body is faid to be fixt y 

 fo that each of thofe little Concreti- 

 ons. 



