Chessin — On the True Potential of the Force of OravUy. 9 

 (17) V'^gK. 



This discussion, also, shows that it is absurd to retain terms 

 of the order of o>^ in treating the motion of a body relatively 

 to the Earth if the force of gravity is assumed to be constant 

 in magnitude and direction, i. e. if formula (17) is taken to 

 represent the potential of this force . Yet the delusion that 

 by retaining terms of the order of <a^ they have reached more 

 accurate results is still to be found among authors who dis- 

 cuss the motion of a body relatively to the earth, taking into 

 account the latter' s rotation about its axis. 



Issued January 29, 1902. 



