CE te ander le 
% ee 
' é 
( 168 ) 
According to equation (2) the following equation holds good for 
function /(R): 
2F'(R) + RF"(R)= Cy ( Me“ edere) 
We find easily: 
C v —qR 
RE(R)= Gp (MT + Ne MM )TER+D. den 
in which Z and D represent constants. 
If in equation a we substitute the expressions we have found, 
for g(r), F(R) and F(L), we find the relations which must exist 
between the constants. We shall easily find: 
M = fl N= — a 
2q 2q 
Therefore 
Abt ABe al ME 
p (r) — 6 Pr ge . . . . . . (9) 
and 
qk —gh 
e e 
PIR =S —— de | 
Ba (10) 
The potential for a spherical shell in point P (see fig. 1), becomes 
therefore !): 
Bs ee le Wer ORS, 
e 
R ed 
MP (R) g(r) i : 
If o is the density, then 47 R°dRg=M. For the whole sphere 
we get therefore for the potential in an outside point: 
R 
R 
Ae teeta x 
Ane y(r) (F(R) BdR=4n9— zE É fate —e arn 
qr 
1) We put the constant of the potential function = 0. 
