wees eo ee aie [Me Pi ot | Nees, | 
: a Mee, ee ee A 4 “e 
b % iy 
me 
W. A. Norton on Comets. 93 
the nucleus, and the repulsion of the sun. Let g= acceleration 
due attraction of nucleus, at its surface; or, what amounts es- 
sentially to the same, the excess of the attractive over the re- 
pulsive acceleration. We now obtain 
eo ae 
” Sheed, 2G OS i) 
If we suppose g = 0, we have 
v2 
A= ie ae 5 ee 
which is of the same form as equ. (2). 
In view of what has now been established we may conclude 
that, if the force of repulsion is of the same intensity, on all 
b 
the nucleus to the na ne point X. Fig. 3 shows a number of 
g to various angles of emission. 
FRO 
, 
+ on the in, the nt form depends upon 
the obliquity to axis which the head is viewed.. 
