

( 290 ) 



T dp 



From 



follows 



lience 



P = 



p dTji, 

 V — b v^ 



{v—by " ydTj; 



dT L, 



rj.(dP 



or also, in virtue of («) : 



<a=G'^-^ 



r-b ' X — b\dTj„ 

 a\ RTWdp 



.: + (! + ,n3) 



Lb 



1 + -i— t('-]{.v +y) 



So we must calculate [t.,]- F»'om (1") follows immediately by 

 lojjavithmic dilfereutiation (see lor the tirst mcuiher also the calcu- 



lation for f ~ 1) 

 dv Jt 



x-\-\ d^ y q^ d<f .v dip 



^?(l_.i)(l^.,.^i)(/7' T RT dT (fdT 



RT 



<f dJ 



Now from <ƒ) = (! -f .I'i?) 



1 dif 



di 



Lb 



d^ 



follows 



1 d,H 



<f 



-L = '- A Lb -^ = .V. + (14- .'?'i^) 



dT l^.vihlT^ v-b dT l-|-.r,'irf7\ ''v-b 



Lb 



hence also 



1 d(f •v-\-(p d[3 



so 



(pdT l-\r^v[3d2' 

 So we get, as q^-{- yRT ^ q: 



A' + l d[3 q {x-\-ipyd'^ 



^3{\—^){\^xi3) dï'^ RT' ~ l-^x^dT 

 9. 



d^ 

 dT 



RT- 



^:^(l-«(l+.^,«)^ 



.r + l 



+ 



(..^4-.^)= 



i?(l-|i)(l+.'i5) 1 + ^/3 



1 4- 



1 



^ + 1 



/5(l-i?)(.r + ./)^ 



