Mee 
of Central Forces. 405 
= rs : m==1. 
VU Y | P aN—3 
pes nt 
rare sth Say) ere 
im 
=== +. ——_— 
pret mai 7, 
v/ 7 pay a oe y-3 eal yo 
1--m “l—m 
# being lefs than 1. 
n—1 Saal; ' 
Apel xs x ye 
_—~ =< 
ig errs ies i ‘2 
r — yr 
= 0 and m— 0. 
The 4th. theorem is found by making the 
fame fubftitution as before. 
Cor. 1. If 22, the feveral values of 7 will 
* become 
ie 
™ oe 
m—1 
m being greater Bat 1. i 
yy 
a —— - Gis ae Ee 
VY ry—P 
w= x yy | 
= : 
. 2 oy 2 
‘i 8 rr ae PX —)-7 
1—m 1—# 
in being lefs than 1. 4, 
