one already given, which is, that they are bound to
the sun by the two co-equal forces, the centrifugal and centripetal
forces, and while so bound are carried round the sun by the
electro-magnetic aetherial currents which extend out into space. It has
to be remembered that the aetherial electro-magnetic currents
circulating round the earth are situated within the aetherial currents
which circulate round the sun, therefore the plane of the moon's orbit
will coincide more or less with the plane of the earth's orbit. We have
now only to go one step further to get our complete conception of the
plane of the ecliptic.

In Arts. 107 and 108 we learned that the sun was subject to Kepler's 1st
and 2nd laws, and as a natural result we came to the conclusion that it,
too, was circled round some central body. We have only to apply a
similar course of reasoning to the sun and its central body as we have
to the moon and the earth, and the earth and the sun, and then we arrive
at our physical conception of the plane of the ecliptic, which is due to
the aetherial currents that circle round the sun, while that body is
carried round some other central body.

Thus by the circulating Aether currents, originated and outflowing from
their respective sources, each source being immutably fixed and bound to
each other by the two equal and complementary forces, can be accounted
for, the uniformity of position and plane of the various orbits of the
various satellites, planets, and the sun, as they move in one great
plane, termed the Plane of the Ecliptic.

It could not be otherwise than it is, and thus another celestial
phenomenon can be accounted for on a real tangible basis by accepting
the existence of those aetherial currents which form the physical basis
of all the celestial mechanism.

If further evidence were required of the existence of these rotating
Aether currents round the sun, such evidence is found in that phenomenon
of the solar system known as the Zodiacal Light, of which up to the
present no physical explanation has been forthcoming. In the conception
of the atomic and gravitating Aether which rotates round the sun, I
venture to premise will be found the physical solution of this
phenomenon also.

I will refer the reader to an extract taken out of _Outlines of
Astronomy_, by Herschel (Art. 894), so that we may see what his
conception of the zodiacal light was, and we will see how far his
explanation is in conformity with o