Materials of sex education, summary, 197-99. Medical phases of immorality, 15, 16, 32-44; statistics of venereal diseases in the United States, 32; the microbes of syphilis and gonorrhea, 36-39; infection of innocent persons, 39-41; possibility of recovery, 41; bibliography, 205. Medicine, means of defense against social evils provided by, 2, 4. Menstrual pain, 159-61. Menstruation, 159-61. Mental suffering among adolescents, 130, 131. Methods of sex education, summary, 193-97. Minimum wage, 67. Ministers, not competent to give instruction in sex relations, 3. Minneapolis, report on women's wages in, 56, 59. Moral and religious phases of the social emergency, 23, 168-89; bibliography, 212. _Mother Nature and Her Helpers,_ 104, 107. Motion-pictures, 6, 19, 72. Muscular activity, importance of, 155-58. Nature study, 92. Nervous system, stability of, 154-58. Newspapers, 79. New York, report on women's wages in, 56, 59. Noguchi, his test of the syphilis microbe, 38. Normal schools, instruction in sex relations to begin in, 3; sex education for teachers to be given in, 192. Novels, 7. Opiates, 63. Orders, social, 77, 80. Oregon, surveys made by the Consumers' League in, 52, 53. Oregon Social Hygiene Society, 151, 195 _n._ Paralysis, 32, 34. Parenthood, 180, 181. Parents, confidence between child and, in matters of reproduction, 89-92, 110-22; meetings for, 122-26. _See_ Instruction. Paresis, 32. Parties, social, 78. Passion, controlled by love, 174-78; by religious fervor 176. Patten, Prof. Simon N., quoted, 51. Pessimism, 173. Philadelphia, report on women's wages in, 56, 59. Physical exercise, 138, 139. _See_ Play. Physiological phases of immorality, 13-15, 25-31; instruction in physiology of reproduction, 25; the sex impulse, 26-28; belief in physiological necessity of gratification, 28-31, 33, 99, 146, 176, 198; bibliography, 204, 205. Physiology, study of, 93. Picture post-cards, 19. Play, 81-83, 87, 88. Playgrounds, 81-83. Pool-halls, 74. Portland, Ore., women's wages in, 52, 53; attendance at moving-picture shows in, 72. Portland, Ore., Municipal Employment Bureau, 64. Portland, Ore., Vice Commission, 57, 60. Priests, not competent to give instruction in sex relations, 3. Problem plays, 6. Property, used for immoral purposes, 17. Prostitutes, what is to be done with them, 14; status of, 65. _See_ Prostitution. Prostitution, past efforts to deal with, 1, 3; physiological factors of, 13-15, 25-31; medical phase of, 15, 16; economic phases of, 16-18; commercialized, 17, 18, 195; and recreational pursuits, 19; legal phases of, 20, 21; and public education, 21-23; moral and religious aspects of, 23; biological aspect of, 23. _See_ Social emergency. Psychic therapy, 160. Public opinion, relation of, to public education and to law enforcement, 21. Quack doctors, 7, 18, 30, 130, 145, 199. Recreation centers, 81-88.