[ 334 ] 
that Diftance be denoted by Unity ; and, fuppofing 
z to denote any other Diftance, let the centripetal 
Force be univerfally exprefled by z n . Then the 
Fluxion of the Angle at the Center will be exprefled by 
■ pz 
\ L ' ' ' ' ^ „ 
Put a = i— 
r 
W P 2 + 
X Z 2 — p 2 _ 
7l ~\- 1 »-j-I 
p % ^ and x= i — z\ and it will become 
j — ^ x " 
I — X x 
V 
a x 
+ 
— - = i. i — a i into 
I V X I 
I — — V 
X 
~ X 
•VX . ’V.'V-I v- r l~'2. V-7, 
a + XX 2 -Xx 3 tfc. 
2 2 -3 2 . 3.4 
__ 7 T 
x 2 x-}-x 2 x + &C, 
Now, to find the Fluent of the firfi Term 
hereof (drawn into the general Multiplicator) or 
a _ . ZZ + tV -~~ x x 2 &c. 3 ** 2 x, we have (as 
before) n— 1 , m—— — 6=^— =~, 
0 / -* 2 - f -3 
34 
, &c. Alfo R=~ } S 
v~ 2 . 4^-5 
v a ■‘t w # 
and confequently the Fluent itfelf (when the Body 
arrives at the lower Apfe) * 
_2 
. V~ 2 ^,y r 16^-37-1; + 22 
* + 17** + 
After the fame manner the Fluent of the 
fecond 
