be attracted and swallowed up
by the sun.

Thus we learn, that while the sun is the centre of a centripetal force,
which ever operates far and wide throughout space, it is equally the
centre of a repulsive or centrifugal force or motion which also operates
co-extensively and co-equally with the former.

Not only so, but every planet and satellite, nay every particle and
every atom, while it is the centre of a centripetal force, is also the
centre of a repulsive force, as pointed out by Professor Tyndall, which
force is due in each and every case to the pressure of the aetherial
atmosphere which surrounds the atom or molecule, satellite or planet.
Thus the physical conception of heat in its effect on molecules having a
repulsive force (Art. 63) is confirmed, and that that force is due to
the pressure of the Aether is also confirmed by subsequent
investigations into the phenomena of light and electricity, by which we
have arrived at our physical conception of the Universal Centrifugal
Force.

So that we have now a physical conception of the experiment performed by
Nichols and Hull of America, and by Professor Lebedew of Russia, in
which they conclusively demonstrated the existence of the pressure of
aetherial light waves, which proves beyond the possibility of doubt the
existence of this physical centrifugal force. Every atom and molecule,
therefore, is the centre of two forces, which co-exist together, and
every meteor and satellite and every planet is also the centre of the
same two forces, and this we shall find in its application to planetary
phenomena will have a most important bearing on the physical conception
of those phenomena. Thus it is the Aether medium, by its energy of
motions, that constitutes the companion and complementary force to
Gravitation Attraction, and which, as we shall see later, is the medium
which forms the physical basis of that attraction also. It is, then, by
the combined and harmonious working of these two co-equal, co-existent,
and co-extensive forces that worlds roll and rush, sweep and swing, move
and rotate about their respective centres; and, by these two forces
working in perfect harmony, that that order and stability are produced,
which everywhere pervade the universe of worlds, and form them in their
entirety into one grand, ultimate, and harmonious system.

To develop and prove this fact, by explaining their manner and mode of
working, we shall now proceed to consider Newton's