CONTENTS. 



fHTKODUOTION PagCS 1-4 



■B' 



PART I. 

 THE DESCENT OR ORIGIN OF MAN. 



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CHAPTER I. 



The Evidence of the Descent of Man from some Lower Form. 



PACK 



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 .......... 5 



CHAPTER II. 



On the Manner of Development of Man from some Lowek 



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 ..... 2fJ 



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 



