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 



