CONTENTS. xli 



SECTION II. 

 SPEECH. 



PAGE 



678. Speech, a mixture of musical sounds and of noises . . . 1092 



679. Vowels and consonants 1092 



680. The manner of formation of the several vowels .... 1093 

 681. The manner of formation of the several groups of consonants . 1096 

 682. The manner of formation of the more important individual con- 

 sonants 1097 



SECTION III. 



ON SOME LOCOMOTOR MECHANISMS. 



683. The general characters of the actions of skeletal muscles . . 1101 



684. The erect posture 1102 



685. Walking 1102 



BOOK IV. 



THE TISSUES AND MECHANISMS OF REPRODUCTION. 

 686. The general features of reproduction 1109 



CHAPTER I. 

 IMPREGNATION. 



SECTION I. 

 MENSTRUATION. 



687. The transference of the ovum from the ovary to the uterus. The 



changes in the uterine mucous membrane 1111 



SECTION II. 

 THE MALE ORGANS. 



688. The movements of the spermatozoa 1114 



689. The chemical constituents of semen. The vesiculse seminales and 



prostate 1115 



