ATTRACTION. OBLATE SPHEROID. 



through the point (/, A) parallel 

 ax in of r makes 



of tbo spheroid ; then 



hr attraction ,,!* this i-lnm-nt mi th- attrari,-,! j, t -V . 

 r; u olvcd parts of this parallel to the 



, are 



and 



p oc the attractions of the whole spheroid will 



t'oiiM.l i.v in! ..-:_- th.-.s,- BDnHMOl l> tw, VM j.rujn-r 

 ts. We proceed MM limits. 



1 



/+ r sin 6 cos <f> for ar, 

 <y -!- r sin sin ^ for y, 

 A + rcos0 a; 



the equation to the spheroid becomes 

 rsinflsin^)* 



f/sin^cos^-t-^sin^sin^ A cos0) 



r t ~?^ +n 





-^:'' -':':'" 



A'V-HS^TFr-f^-ir i). 



T.8. 19 



