[ 3 
Now if we have regard to the Smallnefs of thf 
Line Nr, and obferve how little the Angle >N C wilt 
differ from a right one, we may perceive that the Dia- 
meter CN contains the fame Angle with the perpen- 
dicular NX in N, as the Diameter CN with the per- 
pendiculaf at y $ that is to fay, that the Angle N G v 
is the fame as the AngleCNX j fo that inftead of n we 
may take Wherefore the foregoing Hxpreflion of 
the Attraction of the Ellipfoid BE be, a&ing accord- 
ing to the Direction CX upon a Corpufcle placed in 
c i — {— p C X i -f* q C X 
N, will be 2cfe * 
5 + P 
CX 
CN' 
2 ege 
5 + q 
X 
CN 
Problem VII. 
To find the ‘Direction of the Attraction of a Cor * 
pufcle N towards the Ellipfoid. 
XII. By the fecond Problem we {hall find the At- 
traction of the Spheroid according to CN to be 
i “f" P * -h* q 
acfe .. _-4-i£&£ > by 'expunging what may be 
3 t“ P 3 “r q 
here expunged. Then by taking a fourth proporti- 
onal to thefe three Quantities, the firft of which is the 
Attra&ion according to CN, the fecond is that ac- 
cording to C X, and the third is the right line CN s 
there will arife 
r +P, 
fe 
_ 5 + P 
5 + q 
fe I + p 
-fr— + 
1 4-q 
ge 14 
xCX— Cl. 
O O 2 
Whence 
