XX CONTENTS. 



CHAPTEK XVI. 



PAGE 



OF MUSCULAB MOVEMENTS ....... 909 



1. General Considerations ....... 909 



2. Of the Symmetry and Harmony of Muscular Movements . .911 



3. Energy and Rapidity of Muscfftar Contraction . . . .917 



4. On the Influence of Expectant Attention on Muscular Movements . 920 



CHAPTER XVII. 



OF THE VOICE AND SPEECH . . . . . . .' 924 



1. Of the Larynx and its Actions . .- , . t . . 924 



2. Of Articulate Sounds 935 



CHAPTER XVIII. 



OF THE JNFLUENCE OF THE NERVOUS SYSTEM ON THE ORGANIC FUNCTIONS . 941 



CHAPTER XIX. 



OF GENERATION . , . . . . . . 948 



1. General Character of the Function . . . .948 



2. Action of the Male . ' . . ; . . . . 951 



3. Action of the Female . . . . . .957 



4. Development of the Embryo . . ' . . . . 985 



5. Of Lactation . . . . . . . 1018 



CHAPTER XX. 



OF THE DIFFERENT BRANCHES OF THE HUMAN FAMILY AND THEIR MUTUAL RELA- 

 TIONS . . . ' . . . . . . . 1029 



1. General Considerations . . . . . . . 1029 



2. General Survey of the Principal Families of Mankind . . . 1042 



CHAPTER XXI. 



OF DEATH . 1054 



