Chap. 9. ^ TrMifg of B O D I E S. 93 



Let us then fir ft fuppofe the body ftruckcn to be a hard body 

 of no exceeding bigncfle: in which cafe, if the ftrokc light per- 

 pendicularly upon it, it will carry fuch a body before it. But if 

 the body be too great, and have its parts fo conjoyned, as that 

 they cue 'vcakcr then the ftrokc; in this cafe the ftroke drivcth 

 one pare before it, and fo breaketh it from the reft. But laftly, if 

 the parrs of the ftruckcn body be fo cafily cefliblc, as without 

 difficulty the ftroke can divide them, then itentereth into fuch a 

 body untill it hach fpent its force. So that now making up our 

 accountj we fee that an eqtiall crTe proceedeth from an equall 

 force in all the three cafes; though in themfelves they be far dif- 

 ferent. But we arc apt to account that cfTeft greater, which is 

 more considerable unto us by the profit or damage it bringeth 

 us. And therefore we ufually fay, that the blow which fhaketh 

 a wall, or beateth it down, and killeth men with the ftones it 

 fcattereth abroad; hath a greater effecl then that which penetra- 

 teth far into a mud wall, and doth little harm: for that innocu- 

 oufncfle of the effecl, maketh that although in itfelf itbeas 

 great as the other, yet it is little observed orconfidered. 



Thi$ difcourfc drawcth on another: which is to declare how 

 motion ceafeth. And to fumme that up in fhort , we fay that WJ , * 2 ' 



rf i v *" Cn * nioYe?. 



when motion comcth unto reft, it decreafeth & pafleth through biccomcchto~ 

 all the degrees of celerity and tardity that are between reft and Jn^Jrtde* 1 " 

 the height of rhat motion which fo declineth : and that in the crcafcaccor- 

 proportion of the odde numbers, as we declared above, ttm it ruiofVn. 

 did encrcafe. The reafbn is clear: becaufe that which miketh a 

 motion ceale, is the refiftance it findcth : which refiftance is an 

 aclion of a mover that rnovcth (bnieciiing againft the body 

 which is moved, or fomcthing equivalent to frcli an action: 

 wherefore it muft follow the laws that arc common to all moti- 

 ons: of which kind thofc two are.that we have cxprcflcd in this 

 conclusion. Now that refiftancc is a countermotion., or cqoiva,- 

 lentto one, is plain by this; that any body which is prcflcd muft 

 needs prefTc again upon the body thatprcfleth itj wherefore the 

 caufe that hindercth fuch a body from yielding , is a force mo- 

 ving that body agamft the body which preffeth ir. The particu- 

 lars of all which we fliall more at large declare, where \vefpeak 

 of the a&ion and reaftion of particular bodies. 



CHAP. 



