[ 18 <? ] 
By refolving this centrifugal Force according to the 
Perpendicular to CN, we fhall have 
<p*CX . > . i 
-7-p? which 
2ctXCE 
h^incr sdrtaH tn 2 c g e A ^ CX 
being added to 
found by Prob. V. will give the whole Force of the 
Body N, according to the Direction CX, when the 
Spheroid is converted about its Axis. But becaufe 
this Body, by virtue of the Attraftion according to 
CN, and the Force according toCX, ought to have 
a perpendicular Tendency to the Superficies 5 we fhall 
2 c f e 1 
3~4-p 
fhall have this Analogy, CN. CX: 
2 cee 
i + q 
CX 
CX 
3 + q 
— x 
2 A 
CE 
2cfe I + p 
“7 TT* 
CX , „ i+q 
2 c g e 1 ^ 
CN 
7T7 
.. CN And hence, becaufe CN and CE may be 
aflumed as the fame on this Occafion, it. will, be 
8 cf e 1 | 8 c g e * 
8+PX5+P 3 +qxs+q 
And as in this Value of the centrifugal Force, no 
Quantity enters but what will agree to any Point N > 
we may therefore conclude, that 
wh ™ our fuppos'd elliptical Spheroid 
cal. Bodies -will gra- performs its Rotation in. a proper 
•vitate perpendicu- Time, fo that the centrifugal Force 
Lrly to its Surface. at t } lc Eq Uator may be as before ; then 
the centrifugal Force in any other Place N will be 
fuchas it ought to be, tocaufe Bodies to gravitate in a 
perpendicular Direction to the Surface. 
XV. If 
