tion Attraction, and which is subject to exactly the
same laws. Unlike Gravitation Attraction, however, its power and motion
is ever directed away from the central body, the sun; and if such motion
exerts any power on any planet with which it comes into contact, that
power or motion can only be a repulsive motion in the same way that heat
is a repulsive motion. Assuming, therefore, that light, through the
medium of the aetherial waves, does exert this repulsive motion, then,
according to the law of inverse squares, it can be seen that if a
planet's distance be doubled, the repelling power of the aetherial light
waves would be decreased 1/4, while at the same time the attractive
power of the centripetal force would be decreased 1/4 also. If, on the
other hand, the planet's distance from the sun be reduced to 1/2 of its
former distance, then the repelling power of the aetherial light waves
would be increased four times, but contemporaneously with the increase
there would be an increase in the attractive power of gravity, which
would exactly counterbalance the increased repelling power of the light
waves. So that in assuming that there is this repelling power in the
light waves, there are thus two forces in existence in the solar system
(which is a type of all other systems), or rather two motions, as all
forces resolve themselves into motions of some kind, one motion ever
tending from the central body, that is, the motion of the aetherial
light waves, and the other tending to the central body, that is, the
force of gravity, which we shall see later on is also a motion of the
Aether, whose influence is ever towards the central body, be it a sun,
star, or planet. These two motions, therefore, are subject to the same
law, viz. that their power or intensity is not only directed in straight
lines from the central body, but their intensity is regulated exactly by
the same law of inverse squares. If the repelling motion be doubled,
then the attractive motion or power would be doubled also; if the
repelling motion be quadrupled or halved, then the attractive force of
gravity would be quadrupled or halved in the same way, the two forces
being exactly increased or decreased in the same ratio according to the
law of inverse squares.

ART. 76. _Velocity of Light._--The transmission of light is not
instantaneous, as it requires time for its propagation through space,
from the luminous body which gives rise to all light, as the sun fo