a* A Trtatfi tf B D I E S. Chap. 5. 



iuxijtt a rc lighter and rarer tlicn aircj as fire is, and as fome 

 will have the ather to be. But already the difproportion is fo 

 great, and the vacuity fb (hangely excecdeth the body in which 

 it is, as were too great an abfurdity to be admitted. 



And beftds, it would deftroy all motion of fmall bodies in, 

 the aite, if it be true ( as Ari.fi ode hath demonftrated in the 

 fbiiith book of his Phyfieks ) that motion cannot be made but 

 among bodies, and not in UACUO. 



Again, if rarity were made by vacuity, rare bodies could not 

 be gathered together , without lofing their rarity and be- 

 coming denfe. The contrary of which, we learn by conftant 

 experience ; as when the fmith and glaffemendcr drive their 

 white and fury fires., (as they term them;) when aire piercech 

 moft in the (harp wind ; and generally we fee that more of the 

 faijae kind of rare bodies, in IciTe place, workcth moft efficaci- 

 oufly according to the nature that refultcth out of that degree 

 of rarity. Which argueth, that every little part is as rare as ic 

 was before ( for elfe it would lofe the virtue of working ac- 

 cording to that nature; ) but that by their being crowded toge- 

 ther, they exclude all other bodies that before did mediate be- 

 tween the little parts of their main body; and fo, more parts 

 being gotten together in the fame place then formerly there 

 were, they work more forcibly. 



Thirdly, if fuch vacuities were the cajfeof rarity, it would 

 follow,that fluide bodies being rarer then folid ones,thcy would 

 be of themfelves /landing, like nets or cobwebs : whereas con- 

 trariwife, we fee their natures are to run together, and to fill up 

 every little creek and corner : which cffeft, following out ofthc 

 very nature of the things themfelves ; mutt needs exclude va- 

 cuities out of that nature. 



And laftly , if it be true ( as we have (hewed in the laft 

 Chapter )that there are no a&uall parts in Quantity; it follow*- 

 th of neccflity, that all Quantity muft of it fclf be one; as Me- 

 taphyficks teach us : and thcn A no diftance can be admitted be- 

 tween one Quantity and another. 



And truly, if I underftand Ariftotlc right, he hath per- 

 fectly demonftrated : that no vacuity is poflible in nature; neither 

 great nor little : and confequemly, the whole machine raifed 

 upon that fuppoficion> muft be ruinous. His argument is to this 



purpofc: 



