ATTBACTIOK. OBLATE SPHROID. 1? ' 1 



ic same mam. . whole attraction parallel 



ic axii 01 



Let C denote the whole attraction parallel to the axis of r, 





/rin* 

 V. c*sin' 



(1 V(l-^) . , 1 

 - 4irAp | ? - - L j| n ' e| . 



spheroid \nprolatt a is less than r. It may be shewn 







Airbpa* ( , < "' . ) 



C ._ , \J(<? o*) ^"" a " I 



y be noticed tlat in both 



rom the expressions in the preceding Article we sec 

 that independent Ic of the 



and depends solely upon the cxcei 



193 



