i68 ESSAYS and OBSERVATIONS 



generating elUpfe fronti the centre, d the 

 dillancc ot any body from the centre of 

 the fpheroid in the plane of the equator ; 

 and the gravity at the di fiance ^, will be 

 to the gravity at the diftance ^, as *— 

 X I +i^+-?iL&c. to I +^+-^ &c. ^ * ^ 



:rt.' 



