at various distances as
represented by the numbers 1, 2, 3, 4, 5, 6, the intensity of the
attracting forces between the same masses at the relative distances will
be represented by the numbers 1, 1/4, 1/9, 1/16, 1/25, 1/36, which are
the inverse squares of the respective numbers representing their
distances. As we shall see, the same law holds good in relation to heat,
light and electricity, and indeed to all forms of energy which radiate
out from a centre equally in all directions.

There is no need to apply Newton's Rules of Philosophy to this
Attraction of Gravitation, as it has been demonstrated to exist, times
without number. Moreover its laws are exactly the same as those
governing the phenomena of sound, light, heat, and electricity, so that
apart from being proved by actual experiments in relation to the gravity
of the earth, we have a wider experience of the application of the same
ruling principles of the law in other departments of science.

The Law of Universal Attraction, which is strictly the Centripetal Force
of the compound Law of Gravitation, fully satisfies the three governing
rules of Newton's Philosophy. Not only is it simple in its conception,
but it is borne out by experience, and adequately accounts for the
distinctive phenomena which it seeks to explain. By it, astronomical
observations can be taken with a precision and certainty that defy error
or failure. The motion of a planet in its orbit can be so perfectly
calculated, that its position in space in relation to other planets can
be foretold years in advance. The theory of the Aether, therefore, which
is to be perfected in this work, must philosophically show that the
pressures or tensions of that medium, which are postulated as the cause
of Gravitation Attraction, must themselves fulfil the laws of inverse
squares, which govern light, heat, electricity and the Attraction of
Gravitation. I premise that this will be done in the theory of the
Aether to be submitted to the reader in the after pages of this work.

ART. 23. _Terrestrial Gravity._--Before passing from this phase of the
subject, I should like briefly to look at the question of the Attraction
of Gravitation from the standpoint of our own earth, as by so doing we
shall notice some facts regarding the same, hitherto unnoticed, in the
preceding articles.

Terrestrial Gravity is but a phase of Universal Gravitation. One of the
most familiar facts and phenomena of everyday life is, th