xii CONTENTS. 



PAGE 



The History of Life on the Theory of Descent with Modification . 144 



Letters retained in the Spelling but Useless in Pronunciation . 146 



Man's Deficiency in Tail ... . ■ 147 



Points of Kosemblance between Man and Monkey . . . 149 



Variability of Man . . . ^ . . • 152 



Causes of Variability in Domesticated Man . . .153 



Action of Changed Conditions ..... 155 



The Inherited Effects of the Increased and Diminished Use of Parts . 156 



Reversion as a Factor in the Derelopment of Man . . 158 



llerersion in the Human Family . . . . 160 



Prepotence in the Transmission of Character . . 162 



Natural Selection in the Development of Man . . . 163 



IIow Man became upright ..... 165 



The Brain enlarges as the Mental Faculties develop . . .161 



Nakedness of the Skin ...... 169 



Is Man the most helpless of the Animals ? .... 171 



vni. 



Mentai Powers of Man and the Lowek Animals coMPABiD. 



Fundamental Intuitions the same in Man and the other Animals . 175 

 Man and the Lower Animals excited by the same Emotions . . 177 



All Animals possess some Power of Reasoning . . . 1T9 



The Power of Association in Dog and Savage . . .181 



The Lower Animals progress in Intelligence . . . 182 



The Power of Abstraction ...... 183 



The Evolution of Language ..... 185 



Development of Languages and Species compared . . .188 



The Sense of Beauty ...... igi 



Development of the Ear for Music ..... 190 



IX. 



Development op the Moral Sense. 



From the Social Instincts to the Moral Sense . . .195 



Human Sympathy among Animals . . . . .197 



The Love of Approbation . . . . . .199 



Fellow-Feeling for our Fellow-Animals .... 200 



Development of the Golden Rule . . . ... 201 



