44 A NEW METHOD OF DETERMINING 
Let 
(m) 
Je 
[prada ean Ts 
yn (23) 
hey 
then 
(m) (m—1) 
= fOr 
hey pee 
From this general expression we find 
pe ca 
= aD 
hs ie 
(2) (1) (0) 
I pS k pa aah ni (24) 
hy hy hy 
= Go = Ee 
(m) 
: : g hs + sates 
From the values here given, since —Gey 1s put equal to p,, we have, by increas- 
hs s 
ing m by unity, 
(m-+1) 
hs ae 
may — Pm: Pri 
Putting a = Tm, equation (22) 
Com 
takes the form 
Pm » Pm Ste 1 = Tn = Pm: 
From this we find 
1 
), = — 
Pm Tn— Pm+1 
z 1 
Tn — — 1 
