AN OBSTACLE ON A TRAIN OF ELECTRIC WAVES. 
317 
is given by 
where 
Therefore 
whence, writing 
Xtl + tt J «o 
_ J X /I j 
Ua — — IT + 
A 
'^1. 
^ [ttVCi ■ Ki + R-Ci; 
I = _ ^ g.(Vi_K.-R) 11 _2 -v.TA r ^ 
l/C xii + JA. L Jiio i 
TTt r 
2-Ag 4 ^ 
j Itn 
it follows that the principal parts of tlie components of the magnetic force due to the 
assumed surface distribution are given by 
_ y—y)o 
Y Ri + R '~n~ 
an = -(l —L), 
2 c,.(V«-K,-E) 
Q _ 6K O ba / 1 J \ 
Pi) “ T> , T> 
V Ih + R R 
To = 0- 
Now, a', y8', y', the principal parts of the components of the magnetic force due to 
the oscillator at the point 0 are given by 
for 
therefore 
a' - 
-R,-K) _ 
IK~ 
y-vo .u 
UVJ-B, 
V 
(Ri + Rf 
V 
R 
R' — 
LK'^ 
7 
7 
1 
P — 
V 
(Ri + Rf 
V 
R “ 
y' = 
0, 
a? _ X 
-^0 
y 
y- 
-Vo. 
'/(Ri+R), 
Ri + R R ’ Ri + R R ’ 
«o = -a'(l-L), /3^ = -^'(1-L), yo = 0, 
and the principal parts of the components of the magnetic force at the point P due to 
the oscillator and the assumed surface distribution are given by 
where 
a = La', yS = Ly8', y = 0, 
