if she expected to spend the day there. She will then
look into the glass and utter a low sound, and begin to reach out her
long arms in search of the other monkey. It is surprising to see how she
will adjust her reach as you change positions with the glass. Of course,
as you remove the mirror from her the image is removed accordingly, and
she extends or contracts her reach to suit that distance. This is not,
however, an evidence of her mathematical skill, since to her mind the
image is doubtless a real thing, and she is governed by the same
instinct or judgment in reaching for it as she would be if it were real.
More than any other, the spider monkey seems to admire herself in the
glass; notwithstanding she is about the homeliest of all the Simian
tribes, yet she will sit for hours in almost perfect silence, and gaze
upon her image.

CHAPTER XV.

Man and Ape--Their Physical Relations--Their Mental
Relations--Evolution was the Means--Who was the Progenitor of
the Ape?--The Scale of Life.

If we could free our hands from the manacles of tradition and stand
aloof from our prejudices, and look the stern facts in the face, we
should be compelled to admit that between man and ape there is such a
unity of design, structure and function, that we dare not in the light
of reason deny to the ape that rank in Nature to which he is assigned by
virtue of these facts. Physiologically, there is no hiatus between man
and ape which may not be spanned by such evidence as would be admitted
under the strictest rules of interpretation. We may briefly compare
these two creatures in a broad and general way, so that the
unscientific and casual reader may comprehend.

[Sidenote: MAN AND APE]

The skeleton of man is only the polished structure of which that of the
ape is the rough model. The identity of the two, part by part, is as
much the same as the light sulky is the outgrowth of the massive
framework of the old-time cart. Whether man and ape are related by any
ties of blood or not, it is evident that they were modelled on the same
plan, provided with the same means, and designed for like purposes,
whatever they may be. The organs of sensation and the functions which
they discharge are the same in both, and the same external forces
addressing themselves thereto produce the same results. I do not mean to
say that the same organ in each is developed in the same degree as that
in the other, for this is not the case ev