1183 
Then the following relations hold 
ch ae a 
dR, VR? —re 
22 2. nt) <2 
Woe u = (6 - +) r 
c 
(44) 
ow u 
du W 
n Vre 2Z 
R/O Ree = ir 
I = ENG #2 2 u 
Sigeoneare mae pak = au 
VR - / 
Whence using the relations (41) we have 
5 ' 3 [ a i r2 
I = [e[s+4]] = os 4 = a du (42) 
W w W 
Ww 
Now putting as in (21) 
R, «= Ro Hic iG 
2 
2 Zz a Deh aan Pee A 
VR =r =v a eins Ct tice f 
we have since Ro 2a the inequalities, 
Rc ia 
o $ > V Ro iy; 
a 
> atcl (43) 
a? 
whence 
R cl 
Bue ec) = 2 a+ 2 Swe G(R +cl) - Blatc fg) 
a 
which may be written in the form 
x 
Ae vend 2 CS oO eg Be Jat dee eee De (uu) 
~ € R, Ba = € Ry» Bie 
Since { < t' we see that if nt'/Z a is small and € large, 
he) /sill 1+ cf (45) 
° 
WNENCE seeee 
