370 
p EE Oy 0. 
Then (5) gives 
B + y= const. 
Since at infinity both 2 and y must be zero, the constant is also 
zero. We have thus 
= BS Weeda Te ike NK 
The equation (3) now becomes, accurate to the, second order 
ry =H 29 y= wr" Pp: 
We can split up y in its terms of the first and of the second 
order, thus 
Y= +%s: 
then we have the two equations 
le eee ZRD ra AN 
" € hal ea 2 
ryt ary, 7 Pe REDES SEE (8) 
The integration is got difficult. First I will introduce instead of  - 
x the Gaussian constant /. We have 
ape Bond A 
If now we put 
r 
Ax [rg dr =m (0 Ge ty Stet sy ANN 
0 
Á 
then we find from (7) 
and then from (8) 
9 ' 42," 9 ) 
ry, = — — m(r)? + 82,* g (7), 
r 
where we have put 
r 
tn | rom (r).drsegdr) .<). > ae 
If now we put . 
me (7) mr) AAR (fe. ee 
then 
from which we find easily 
NÀ 2 >) 4 
— . am hl 
van mn (ry 
er 
m (1)? + Sad,’ fir BÀ? m(r)] 9 dr 
LL 
(PE 
