S60 - Prof. J. J. Thomson on 
respectively, m and m’ the mechanical masses of these par- 
ticles, we have 
2 
2 me } 
P= muyt 5 e Uy + Ruy — (atta + v2 + YW), 
19 
2 2 
0 =(m’ a 3 — Jus + Ru, = (avy + Br, = yw), 
0 =(m + te ey + Ree— (Bus + dv. + ews), 
> 19 4 
0=(m'+ “si + Ry,— (Bu; + ov, + ew), 
= (m +3 | Heo + Rw (yuo + ev. + NW), 
3a 
= (m'+ ee \w, + Rwy — (yy + eu, + nw,); 
where R (a, 8, y, 8, €, ») are written for pee’ /R, 
1 (Fs d?R Cm. CR. CBee 3) 
mee 
oo dtd Yo dtodzo dys” Aiod Zo dz9? 
respectively, 
Writing 1, m, x for the direction cosines of the line joining 
the electrified points and y for pe"e?/R?M.M’, where 
Mt ae a 3 M’/=m/ + — 
we find 
= (1+ —) 
oes P img 
si M1—¢” E 
P ing 
guetit | l—g 
w= _ pee" a i? i) 
: 2RM’/M ee aie ¢ 
se pee’ Plm(1+q) 
~9RMM 1g ° 
pee P In(1+q) 
ee 7) a a a 
We see that wo, vo, we are large compared with 1, w,, so 
