Chap. 1 6. 4 TrtAtifi of B O D I E S. 



of them a fuflferer ;cach of them overcoming his opposite in ftich 

 fort, as himff If likcwifc receiveth blows and lofle. But ifonely 

 one of the denfe bodies be fo fhocked as to recoile back, then 

 thatonely fuffereth in iis body, and the other lufTercth oncly in 

 itsvirtuejthat is ; in theaireor other rare body it fendcth before 

 it ; which itdriveth with fuch a violence, that it maftcreth and 

 qiiclleth the opposition of the other body, before it can reach to 

 (hake the denle body, before which it runrrcrh. Yet that rare 

 body muft be prefled and broken inco, in fdme meafnre, by the 

 incoumer of the other(which though never fo vveak yet maketh 

 fbme refiftance)but much more when it cometh to grapple with 

 the denfe body it felf : and fo between them, it is wounded and 

 infeeblcdjlifce thofe fbuldiers that firft enter a breach in a town, 

 from whence when they have driven the enemy, they purfue 

 him to the cittadell,and force him from thence too ; and fb how 

 maimed foever they prove,they make a free &cafie way without 

 refinance for the whole body of their army to follow them, and 

 take quiet poifeflion of that which did eoft them fo much to win. 

 And thus we fee how it may happen that one of thefe moving 

 bodies doth not fuflfer fo much as to be flayed in its journey ; 

 much lelfe, to be driven back. And yet the other body at the 

 fame time work in fome meafure upon it, by working upon 

 what is next to it; which recoiling againft it muft needs make 

 fome impreflion upon it, fincc there can be no opposition but 

 muft have fbme effect. Now this imprcflfion or efFe6l, though 

 it be not perceptible by caufing a contrary motion, yet it muft 

 needs infeeblc the virtue of the conquering Agent, & deaden the 

 celerity of its motion. And thus it is evidentj that in all pure lo- 

 call motions of corporeall Agents, every one of them muft in 

 ibme proportion fuflfer in a6tmg, and in differing muft air. 



And what we have faid of this kind of aftion, may eafily be 

 applyed to the other where the effect of locall motion is den> The former do- 

 pned by a particular name, as it is in the examples we gave of & applyed; 



P . ,. . , . , j- -ii toother locaJ 



heatrng and cooling. And m that, the proceeding vviU appear to motions defign- 

 be the very fame as in this; for if fire doth heat water 5 thc water 

 readtcth again .either upon the fire and cooleth it, if it be imme- 

 cHatc unto it;or elfe upon the interjaccn: aire,if k be at a dittance 

 from the fire. And fo the aire is in fome meafiire cooled, by the this way 

 cold atomes that iffbe rrom the water^whofc compaflfe or fphere 



of 



