Chap. IN Treailfe of BODIES. 123 



it as farre through the Tame medium in the fame time. But it is 

 impofliblc that any caufc fliould produce an efTcft greater then 

 itfclf. 



Again, the gravity muft needs be in a determinate degreerand 

 the virtue that maketh the plummet remount (whatfoever it be) 

 may be put as little as we pleafe: and consequently not able to 

 ovcrfvvay the gravity alone if it be an intrinfecall quality, and 

 yet the plummet will remount : in which cafe you put ah cffofl 

 without a caufe. 



Another experience we may take from the force of fucking; 

 for take the barrcll of a long gun perfectly bored, and fct it 

 upright, with the breech upon the ground, and take a bullet 

 that is exaclly fit for it, but fb as it (rick not any where ( both 

 the barrell and it being perfeSly poliflied ; _) and then if you 

 fuck at the mouth of the barrell ( though never fb gently ) the 

 bullet will come up fo forcibly, that it will hazard the ftriking 

 out of your teeth. Now let us confider what force were neccf- 

 fary to fuck the bullet up,and how very flowly it would afeend, 

 if in the barrell it had as much refiftance to afcend , as in the 

 free aire it hath inclination to go down. But if it had a quality 

 of gravity naturall to it , it muft of neceflity have fuch refi- 

 ftance: whereas in our experiment we fee it cometh as cafily as 

 the very aire. So that In this example as well as in the.othcr, 

 nature teacheth us that gravity is no quality. 



And all or moft of the arguments which we have urged a- 

 gainft the quality of gravity in that explication we have confi- 

 dercditin, have force likewife againft it, although t be faid 

 to be an inclination of its fubjeft to move it felf unto unity with 

 the main ftock of its own nature, as divers witty men do put it: 

 for this fuppofition doth but change the intention or end ofgra* 

 vity: and is but to make it another kind of imelle<5tuall or 

 knowing Entity, that determincth it felf to another end: which 

 is as impoffible for a rtaturall quality to do, as to determine it 

 felf to the former ends. And thus much the arguments we have 

 propofeddo convince evidently, if they be applyed againft this 

 opinion. 



CHAP;. 



