X CONTENTS. 



CHAPTEE XXIT. 



PAGE 



THE REPRODUCTIVE ORGANS, ....... 634 



CHAPTER XXITT. 



DEVELOPMENT, . . . . . . . . . 656 



The Changes in the Ovum, . . . . . . '656 



Development of Organs, ....... 678 



CHAPTER XXIV. 

 ON THE RELATION OF LIFE TO OTHER FORCES, .... 713 



APPENDIX. 

 THE CHEMICAL BASIS OF THE HUMAN BODY, .... 732 



APPENDIX B : 

 ANATOMICAL WEIGHTS AND MEASURES, . ... 754 



Measures of Weight, . . ... . . . 754 



" Length, ..... 754 



Sizes of various Histological Elements and Tissues, . . . 755 



Metrical System of Weights and Measures compared with the Common 



Measures, ........ 756 



CLASSIFICATION OF THE ANIMAL KINGDOM, . . . 756 



INDEX, 759 



