SELECT THEOREMS 



IN PROOF OF 



THE PERPETUITY OF TIME, 



AND OF THAT WHICH IS NATURALLY MOVED 

 WITH A CIRCULAR MOTION. 



EXTRACTED FROM THE SECOND BOOK OF 1'KOCLUS ON MOTION. 



HYPOTHESES. 



EVERY natural body is moveable according to 

 place. 



Every local motion is either in a circle, or in a 

 right line, or mixed from these. 



Every natural body is moved according to one 

 of these motions. 



Every natural body is either simple or com- 

 pounded. 



Every simple motion is the motion of a simple * 

 body. 



* Simple bodies, according to Aristotle, are those which natu- 

 rally possess an inherent principle of motion. For animals and 

 plants possess a principle of motion ; but in these it proceeds from 

 soul and not from nature. 



