[128 ] 



- ^-^ 1.2 2.3 



"«+2.«+T.«.H— I -TTZ;; j_ «-i-2 — «— 2 j--^ ^ ^^^ ^^^^ ^^^^ 



./— f* + 



2.3.+ ' • 2.345 



of this quantity is divifible by y^—e* = Q, becaufe y^m—eia (« 

 being a whole number) is always divifible by yi—e^ 



2.3 2.3.4 



a 1-2 



«-|-2 - - « — 2 , 



«+2.« 

 1.2 



2.3-4-J 



x: I + 



«+2 « — 3 4 , e 



•'^ ''^ 23 4J-6 -^ ^ -^ ^ -t- 



w+i.;;— 3 ^2 «-|-i.«— 1. «— 2. «— 6 ^^ 7?+ 1 



3 + 



3.4.5.6. 



3 



3-4 34.5 3-4-5-6 



J*_|.£2j'2 &C. 



Alfo i-= JLxi— ""^' " ^ e"- Ssc. It is evident from the 

 R « 23 



p 



procefs for ihe values of R, and — that only the even powers of 



the eccentricity can enter into thofe value?. 



Subftituting 



