CONTENTS. 



PREFATORY 



PAGE 



V 



PART I. 



CHAP. 



I. ORGANIC EVOLUTION 5 



II. LIFE ....... 8 



III. DEVELOPMENT AND ITS RESULTS ... 13 



IV. CROSS-BREEDING AND ITS RESULTS . . 18 

 V. PURITY OF RACE ..... 22 



VI. THE HUMAN RACE ..... 26 



VII. GENERAL CONCLUSIONS, AND IMPORTANCE OF 



A TRUE THEORY OF EVOLUTION . . 30 



VIII. ANALOGIES ...... 34 



THE ART OF WEAVING .... 34 



THE STEAM-ENGINE .... 37 



IX. THEORY OF EVOLUTION .... 42 



X. PHASES OF THE EMBRYO AND FRAGMENTARY 



ORGANS 47 



XI. ENIGMAS AND THEIR SOLUTION ... 51 



XII. ARGUMENTATIVE 61 



XIII. INFERENTIAL 65 



A 



