TABLE OF CONTENTS. 15 



PAGE 



Chapter LIII. Physiology of the Male Reproductive Organs. . 860 



Sexual Life of Male, 860. Properties of the Spermatozoa, 860. Chemistry 

 of the Spermatozoa, 862. The Act of Erection, 863. Reflex Apparatus of 

 Erection and Ejaculation, 864. 



Chapter LIV. Heredity; Determination of Sex; Growth and 



Senescence 866 



Definition of Heredity, 866. Evolution and Epigenesis, 866. Determination 

 of Sex, 868. Growth and Senescence, 871. 



APPENDIX. 



I. Proteids and Their Classification 874 



Definition and General Structure of Proteids, 874. Reactions of Proteids, 875. 

 Classification of Proteids, 877. The Albumins, 878. The Globulins, 878 

 The Albuminates, 878. Nucleo-albumins or Phosphoproteids, 878. Pro- 

 teoses and Peptones, 879. Protamins and Histons, 879. The Compound 

 Proteids, 880. The Albuminoids, 880. 



II. Diffusion and Osmosis 881 



Diffusion, Dialysis, and Osmosis, 881. Osmotic Pressure, 881, Electrolytes, 

 882,-^Gram-molecular Solutions, 883. Calculation of Osmotic Pressure in 

 Solutions, 883. Determination of Osmotic Pressure by the Freezing Point, 

 884. : Application to Physiological Processes, 884. Osmotic Pressure of 

 Proteids, 884. Isotonic, Hypertonic, and Hypotonic Solutions, 885. Diffu- 

 sion or Dialysis of Soluble Constituents, 885. Diffusion of Proteids, 886. 



Index 887 



