444 ANTIENT METAPHYSICS. Book V. 



Or thus, 



All Bodies in Motion round a Centre, In a Circle' or Elllpfis, 

 are moved both by a Centripetal and Centrifugal Force ; 



The Celeftlal Bodies, being moved round a Centre, are moved 

 by both thefe Forces ; 



Therefore they are moved by fuch and fuch Laws. 



Here the conclufion of both thefe Syllogifms Is true, but the pre- 

 mifles, in my opinion, falfe. In place of thefe, I have endeavour- 

 ed to fubftitute other premiffes, which are true, and from which the 

 fame conclufions may be inferred. 



CHAP; 



