332 ANTIENT METAPHYSICS. Book V. 



fimpliclty which we obfervc in the works of Nature, where nothing- 

 is produced by feveral caufes, that can poffibly be produced by one. 

 Nor is Sir Ifaac's Syftem lefs mechanical, for this amendment, as it 

 is fuppofed to be, that has been made upon it by his followers : For 

 it is ftill true, that the Motion of the Planets is carried on by the 

 Power of Matter and Mechanifra merely ; becaufe the Centripetal 

 Motion, or Motion of Gravitation, only gives a diredion to the 

 Motion of the Planet, but does not carry it on. 



CHAP. 



