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INTRODUCTION
CONTENTS.
PART I.
THE DESCENT OR ORIGIN OF MAN.
Pages 1-4
CHAPTER I.
PAGE
THE EVIDENCE OF THE DESCENT OF MAN FROM SOME LOWER FORM.
Nature of the evidence bearing on the origin of man-Homologous
structures in man and the lower animals-Miscellaneous points
of correspondence - Development - Rudimentary structures,
muscles, sense-organs, hair, bones, reproductive organs, &c.—
The bearing of these three great classes of facts on the origin of
man
CHAPTER II.
ON THE MANNER OF DEVELOPMENT OF MAN FROM SOME LOWER
FORM.
Variability of body and mind in man-Inheritance-Causes of
variability-Laws of variation the same in man as in the lower
animals-Direct action of the conditions of life-Effects of the
increased use and disuse of parts-Arrested development-Re-
version-Correlated variation-Rate of Increase -Checks to
increase-Natural selection-Man the most dominant animal in
the world-Importance of his corporeal structure-The causes
which have led to his becoming erect-Consequent changes of
structure-Decrease in size of the canine teeth-Increased size
and altered shape of the skull-Nakedness-Absence of a tail-
Defenceless condition of man
CHAPTER III.
COMPARISON OF THE MENTAL POWERS OF MAN AND THE LOWER
ANIMALS.
The difference in mental power between the highest ape and the
lowest savage, immense-Certain instincts in common-The
emotions-Curiosity-Imitation-Attention-Memory-Imagi-
nation-Reason-Progressive improvement-Tools and weapons
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