346 ANTIENT METAPHYSICS. Book V. 



that there an unelaftic Body will fly oflf when it is impelled, as well 

 as an elaftic Body. 



And thus I think I have proved, that this Axiom of Sir Ifaac's, 

 concerning the Continuation of Motion, is fo far, at leaft, not an A- 

 xiom, as it is not an univerfal proportion, becaufe it not only does 

 not apply to Motion produced by Mind, but not even to all Motion 

 produced by Body, fince I have fhown, that, when the Moving 

 Body a£ts by Trufion or Preflure, the Body moved does not go on 

 by itfelf, but the Motion ceafes as foon as the Moving Caufe ceafes 

 to operate, in the fame manner as the Motion by Mind ceafes. 



CHAP. 



