s so
strikingly the hanging white lichens upon the trees that he is rarely
seen by his enemies.

A book might be written upon the various ways that animals, when closely
associated with other animals or human beings, imitate them. Darwin says
that "two species of wolves, which had been reared by dogs, learned to
bark, as does sometimes the jackall," and it is well known that certain
dogs, when reared by cats, imitate their habits, even to the licking of
their feet and the washing of their faces. If a mongrel dog associates
with a trained dog for any period of time it is remarkable the progress
he will make. For this same reason young dogs are carried on hunting
trips with trained dogs that they may learn by imitation the art of
hunting.

In the whole realm of Nature there is nothing more wonderful than this
matter of protective colouration. Animals do not monopolise the art. It
extends through the whole world of living creatures. The fact that
individual animals have no voluntary control over their own colour is
eloquent testimony as to the existence of mysterious life forces and
racial evolutions which are still far beyond the grasp of man's
understanding. To see a tiny chameleon adapt his colouring to his
environment, be it red, green, or yellow, in the twinkling of an eye, is
to have seen an argument for God Himself.

II

ANIMAL MUSICIANS

_"Nay, what is Nature's self,
But an endless strife towards
Music, euphony, rhyme?"_

--WATSON.

The great thinkers of the age believe that the world is one marvellous
blending of innumerable and varied voices. This unison of sound forms
the great music of the spheres, which the poets and philosophers have
written so much about. Even from a purely scientific point of view,
there is no denying that this music exists. Aviators tell us that when
they listen from a distance to the myriads of noises and sounds that
arise over a great city, these are all apparently lost in a modulated
hum precisely like the vibrations of an immense tuning-fork, and
appearing as but a single tone. Thus the immense noise going from our
world is musically digested into one tone, and the aviator soaring above
the earth hears only the one sound--the music of the spheres.

The deep appreciation that animals have for music is becoming a
generally known fact among those who have studied them closely. Every
one must admit that there is much truth in the old saying that "music
hath cha