affected by the Earth. 247 
forces parallel to ¢S. But the same perpendiculars, throughout 
their changes of magnitude, represent the forces of obliquity 
respectively, and therefore the velocities, however accelerated, 
continue in a uniform ratio to one another and to the distances 
remaining to be described. ‘Therefore both meet the line ¢S at 
the same instant ; and since they have been subject only to 
equal and parallel forces in the direction ¢S, they will not be 
disturbed as to relative motion except by a fraction of the nor- 
mal force above considered, and that fraction ordinarily a small 
one. For, in fact, if the arc En is five millions of miles as above 
considered, the fraction ~;th will express nearly the amount of 
Solar force exerted obliquely upon E,—competent therefore to 
impart a velocity of but th the subtense ¢S in the same time 
and jth only of that available as a disturbance of the relative 
Velocity in direction—being, in relation to the August meteors, 
only 5,';;th part of that relative velocity. This evidently is 
Insensible in relation to disturbances of the earth which depend 
Upon the direction of relative motion. - 
Passing to the error introduced by the supposition that the 
Solar forces upon E and m are equal—and which arises by neg- 
lecting the difference of radius vector — — —. “sim 
ecessary to assume imaginary or improbable amounts Jor tha 
difference, For an arc on of. four ‘ailides and a half of miles 
the angle of the chord and radius vector for the August meteors, 
it would appear from the computations of Prof. H. A. Newton, 
may be taken at about 76°; and if even only 70° were sup- 
n 
line of force in which the 
es place, that the meteor whi 
Point of E i i m. 
Pc ¢and in n, is not m, nfluence, but it is a meteor 
idea of a perfect parallelism of solar i nete 
corresponding bs in distance and place, except that it lies 
‘omewhat forward or somewhat back of the 
Plane E tm, but reaching E with the same 
in both cases, 
We therefore reaffirm the foregoing conclusion, that, for the 
simple purpose of ascertaining the species and amount of those 
fects upon the constituent meteors of a ring which are due im- 
