io Ike Cause of Life and Motion 



would be inclined to the opinion, that this much 

 would have been sufficient. But it would seem 

 that notwithstanding the earth's vested power to 

 maintain her diurnal and her onward movements. 

 She found herself quite unable to keep within 

 her orbit without some assistance. Therefore, 

 the scientist invented two central forces, one to 

 keep her from going inward from her path, which 

 he called centrifugal force, and the other to keep 

 her from going outward from her path, which he 

 called centripetal force. 



Now if two forces acting against a moving body, 

 oppose one another in equal degrees, their effect on the 

 body would be nothing, and therefore with regard to a 

 revolving body, when once it was given a circular 

 movement, it would keep it just as well without the 

 central forces, as with them. It will be shown however, 

 that no such forces exist. But even if they did exist, 

 they would not avail in keeping the earth in her orbit. 

 The earth in her path around the sun, describes an 

 elipse, and therefore, notwithstanding all the ingenious 

 theories to the contrary, it would be impossible for the 

 supposed central forces to act without constantly 

 changing their relative powers. 



The Attraction of Gravity. 



To account for the fact of bodies being drawn 

 to the earth, scientists have enunciated the theory 

 of the attraction of gravity. 



