1. The tribute exacted by tuberculosis; 2. The decline of tuberculosis; 3. The extent to which each sex has shared in the decline of tuberculosis; 4. The etiology of tuberculosis; 5. The etiology of tuberculosis (continued); 6. The etiology of tuberculosis (continued); 7. The etiology of tuberculosis (continued); 8. Portals of entry of tubercle bacilli. Pre-natal infection; 9. Portals of entry (continued). Post-natal infection; 10. The relation between animal and human tuberculosis; 11. The relation between animal and human tuberculosis (continued); 12. The means of distinguishing the three types of tubercle bacilli one from another; 13. The means of distinguishing the three types of tubercle bacilli one from another (continued); 14. The stability of type of tubercle bacilli in artificial culture; 15. The stability of type of tubercle bacilli in the animal body; 16. The stability of type of tubercle bacilli in the animal body (continued); 17. The stability of type of tubercle bacilli in the animal body (continued); 18. The susceptibility to tuberculosis of various animal species; 19. The susceptibility to tuberculosis of various animal species (continued); 20. The susceptibility to tuberculosis of various animal species (continued); 21. The susceptibility to tuberculosis of various animal species (continued); 22. The susceptibility to tuberculosis of various animal species (continued); 23. The susceptibility to tuberculosis of various animal species (continued); 24. Tuberculosis in man: the types of tubercle bacilli which cause it; 25. Tuberculosis in man: the types of tubercle bacilli which cause it (continued); 26. The part played by bovine infection in human tuberculosis; Appendix; Index of subjects; Index of authors.