CONTENTS 9 



EXERCISE 4. Toxins (continued), 896. 



Experiment 10, Botulism Toxin, 896 Experiment 11, Dysentery Toxin, 896 

 Experiment 12, Staphylotoxin (in vivo), 897 Experiment 13, Staphylotoxin 

 (in vitro), 897. 



EXERCISE 5. Toxins (continued) Plant and Animal Toxins, 898. 



Experiment 14, Streptotoxin, 898 Experiment 15, Phytotoxins (in vivo and 

 in vitro), 898 Experiment 16, Zootoxin, Cobra venom (in vivo and in vitro), 899. 



EXERCISE 6. Endotoxins and Aggressins, 899. 



Experiment 17, Endotoxins, 899 Experiment 18, Natural Aggressins, 900. 



EXERCISE 7. Bacterial Protein. Ptomains. Mechanical Action of Bacteria, 900. 

 Experiment 19, Bacterial Protein, 900 Experiment 20, Ptomains, 901 Ex- 

 periment 21, Mechanical Action of Bacteria, 902. 



EXERCISE 8. Kinds of Immunity. Natural Immunity, 902. 



Experiment 22, Phagocytosis in Natural Immunity, 902 Experiment 23, Nat- 

 ural Antibacterial Immunity, 902 Experiment 24, Relative Factors in Natural 

 Immunity, 903 Experiment 25, Influence of Temperature Upon Natural 

 Immunity, 903. 



EXERCISE 9. Acquired Immunity, 903. 



Experiment 26, Acquired Active (Antibacterial) Immunity, 903 Experiment 

 27, Acquired Passive (Antitoxic) Immunity, 904 Experiment 28, Acquired 

 Passive (Antitoxic) Immunity, 904 Experiment 29, Acquired Passive (Anti- 

 bacterial) Immunity, 904. 



EXERCISE 10. Phagocytosis, 905. 



Experiment 30, Phagocytosis (macrophages), 905 Experiment 31, Phagocy- 

 tosis (microphages), 905 Experiment 32, Phagocytosis, 906. 



EXERCISE 11. Phagocytosis. Chemotaxis, 906. 



Experiment 33, Positive Chemotaxis, 906 Experiment 34, Negative Chemo- 

 taxis, 906. 



EXERCISE 12. Opsonins, 907. 



Experiment 35, Normal Opsonins, 907 Experiment 36, Immune Opsonin (Bac- 

 teriotropin), 908 Experiment 37, Hemopsonin, 908. 



EXERCISE 13. Opsonins (continued), 908 



Experiment 38, Mechanism of Action of Opsonins, 908 Experiment 39, Specific- 

 ity of Opsonins, 909. 



EXERCISE 14. Opsonic Index, 910. 



Experiment 40, Determining the Opsonic Index, 910 Experiment 41, Quan- 

 titative Estimation of Bacteriotropins, 910. 



EXERCISE 15. Bacterial Vaccines, 910. 



Experiment 42, Preparation of Typhoid Vaccine, 910 Experiment 43, Prepara- 

 tion of Staphylococcus Vaccine, 911. 



EXERCISE 16. Antitoxins, 911. 



Experiment 44, Standardizing Diphtheria Antitoxin, 911 Experiment 45, 

 Standardizing Tetanus Antitoxin, 912. 



EXERCISE 17. Antitoxins (continued), 912. 



Experiment 46, Specificity of Antitoxins, 912 Experiment 47, Nature of the 

 Toxin-Antitoxin Reaction. Action of Anti-tetanolysin, 912 Experiment 48, 

 Antistaphylolysin, 913. 



EXERCISE 18. Ferments and Antiferments, 914. 



Experiment 49, Tryptic Ferment of Leukocytes, 914 Experiment 50, Testing 

 the Antitryptic Power of Bl<ood-serum, 914. 



EXERCISE 19. Ferments (continued), 915. 



Experiment 51, Abderhalden Sero-enzyme Reaction in Pregnancy, 915. 



EXERCISE 20. Agglutinins, 916. 



Experiment 52, Gruber-Widal Reaction in Typhoid Fever ("Wet" Method), 

 916 Experiment 53, Gruber-Widal Reaction in Typhoid Fever ("Dry" 

 Method), 916. 



EXERCISE 21. Agglutinins (continued), 917. 



Experiment 54, Macroscopic Agglutination Reaction, 917 Experiment 55, 

 Macroscopic Agglutination Reaction (Kolle), 918 Experiment 56, Macro- 

 scopic Agglutination Reaction (Killed Cultures), 918. 



