to perform its evolutions. We are led to believe
from all the foregoing considerations that it is
the manner or the form of the motion.

MODE OF MOTION.--In this respect it seems to
be comparable in every respect to the great and
universal law of the motions in the universe.
Thus, light, heat and electricity are the same, the
manifestations being unlike only because they
have different modes of motion.

Everything in nature manifests itself by motion.
It is the only way in which nature acts.
Every transformation from one thing to another,
is by way of a movement which is characteristic
in itself.

Why, then, should this great mystery of nature,
act unlike the other portions of which it is
a part?

THE WING STRUCTURE.--The wing structure of
every flying creature that man has examined, has
one universal point of similarity, and that is the
manner of its connection with the body. It is a
sort of universal joint, which permits the wing
to swing up and down, perform a gyratory movement
while doing so, and folds to the rear when
at rest.