17. Work of the National Housing Association. (Write to the association office in Washington, D. C., for descriptive literature.)
18. Summary of Irving Fisher's report on national vitality. (Bulletin of the Committee of One Hundred on National Health, etc., prepared for the National Conservation Commission, by Irving Fisher, Washington, 1909.)
19. Preventable diseases. (Hutchinson, Preventable Diseases.)
20. Occupational diseases. (Oliver, Diseases of Occupation.)
21. How to act in case of an accident. (Gulick, Emergencies; Tolman, Hygiene for the Worker, chapter xvi.)
22. The right to leisure time. (Kelley, Some Ethical Gains through Legislation, chapters in and iv.)
23. Legal status of workmen's compensation. (Annals, vol. xxxviii, No. i, pages 117-168.)
24. Health insurance. (Rubinow, Standards of Health Insurance, chapters iii and iv.)
25. The police power. (Guitteau, Government and Politics in the United States, chapter xii.)