tes, planets and suns should possess bodies more or
less of a spherical form, subject to certain qualifying conditions, as
rotation and orbital velocity, and this is in harmony with observation
and experience. For we shall find that even in the case of nebulae, we
have globular, ring or annular nebulae, and elliptic nebulae, while in
the case of comets, the nuclei and coma are more or less spherical.
Further, it is a familiar fact that the shape of all asteroids,
satellites, planets, and even the sun is spherical or that of an oblate
spheroid, which latter is simply due to its rotational velocity on its
axis.

Thus the principle involved in the nebular hypothesis receives its
confirmation in the atomic and gravitating Aether, and with certain
modifications of the different hypotheses advanced, is capable of
uniting all those hypotheses that have ever been put forth in this
direction into one perfect and harmonious whole.

Again, the condensation of the Aether, composed as it is of its atoms,
ever in a state of rotation, does away with the Primitive impulse which
was objected to in Art. 9. For in that article it was shown that the
conception of a primitive impulse as conceived by Newton was
unphilosophical, in that its conception was not simple, and failed to
satisfactorily account for observed phenomena. With the hypothesis,
however, of a rotatory aetherial atom, we have at once those conditions
which at any time, in the history of the universe, may give rise to
those conditions by which a body may be set rotating not only on its
axis, but also revolving around some central body, as the process of
condensation is continued.

So that in the primordial and universal electro-magnetic Aether that
exists in all space, we get those conditions which will not only give
rise to the phenomena of light, heat, magnetism and electricity, but
also those properties, qualities and motions by which are produced,
maintained and perpetuated, the various bodies that exist in the Aether,
which is at once the physical source and cause of the bodies.

ART. 122. _Kinds of Nebulae._--Nebulae may be classified into the
following groups--

1. Irregular Nebulae.
2. Ring and Elliptical Nebulae.
3. Spiral or Whirlpool Nebulae.
4. Planetary Nebulae.

_Irregular Nebulae._--Of this class the most conspicuous are those in
the constellations of Orion and Andromeda. So clearly defined are they,
that they are oftentimes seen by t