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. My
attention was called to this subject many years ago by Sir Charles
Bell's admirable work. This illustrious anatomist maintains that man
is endowed with certain muscles solely for the sake of expressing
his emotions. As this view is obviously opposed to the belief that man
is descended from some other and lower form, it was necessary for me
to consider it. I likewise wished to ascertain how far the emotions
are expressed in the same manner by the different races of man. But
owing to the length of the present work, I have thought it better to
reserve my essay for separate publication.
PART ONE
DESCENT OR ORIGIN OF MAN
CHAPTER I.
THE EVIDENCE OF THE DESCENT OF MAN FROM SOME LOWER FORM.
HE WHO wishes to decide whether man is the modified descendant of
some pre-existing form, would probably first enquire whether man
varies, however slightly, in bodily structure and in mental faculties;
and if so, whether the variations are transmitted to his offspring
in accordance with the laws which prevail with the lower animals.
Again, are the variations the result, as far as our ignorance
permits us to judge, of the same general causes, and are they governed
by the same general laws, as in the case of other organisms; for
instance, by correlation, the inherited effects of use and disuse,
&c.? Is man subject to similar malconformations, the result of
arrested development, of reduplication of parts, &c
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