Huichol Indians of Mexico, 106 Human history regulated by general laws, 160 ---- life, superstition as a prop to the security of, 111 _sqq._ Huth, A. H., 95 Hypotheses, their place in science, 172 Ibo, the, of Nigeria, 119 Iguana used in magic, 30 _sq._ Illegitimate children put to death, 96 _sq._ Immorality, sexual, disastrous effects believed to flow from, 44 _sqq._, 63; supposed to disturb the course of nature, 99 _sqq._; original ground of the conception unknown, 102; supposed to be injurious to the culprits themselves and their relations, 102 _sqq._; superstition as to, 110 Immortality, waste of life and property entailed by the belief in, 111 _sq._; belief in, a fruitful source of war, 129 _sq._ Impalement as punishment of adultery, 67 Inbreeding, question of the effects of, 95 _sq._ Incas of Peru, 173 Incest, disastrous effects supposed to flow from, 45 _sqq._, 61; with granddaughter, 48; with adopted daughter, 49; punishment of, 49 _sq._, 51, 52 _sqq._, 90, 91; with aunt, 50, 51; with a mother, 51, 61, 67; with a niece, 51, 53; with a daughter, 51, 54, 58, 67, 68; with a sister, 51, 54, 59, 60 _n._ 1, 62, 67, 68, 105; enjoined in certain circumstances, 57 _sqq._; expiation for, 105 _sq._; with father, 106 India, superstitious veneration for kings in ancient, 16 Indian Archipelago, precautions against ghosts of women dying in childbed in the, 136 Indians of North America, their custom of driving away the ghosts of the slain, 130 _sq._ Infanticide in China checked by fear of ghosts, 150 _sq._ Infection, physical, supposed to be spread by unchaste persons, 109 Infertile marriage, dread of, 94 Infertility thought to be caused by sexual immorality, 57, 60 _sq._; of women and cattle supposed to be caused by fornication, 109 _sq._ Infidelity of husband supposed to be dangerous to his offspring, 103; of wife supposed to endanger her husband, 106 _sqq._ _See also_ Adultery Inoculation, magical, of hunters, 57 _sq._; of homicides, 121 Insanity, temporary, caused by blood, 122 _sq._ Institutions, early history of, imperfections in the records, 171 _sq._ Ireland, superstitions as to kings in ancient, 17 Irish legend as to incest of brother and sister, 62 Ishtar, the goddess, 38 Isla del Malhado in Florida, 83 Issoudun in British New Guinea, 147 Ja-Luo, the, of Kavirondo, 123 Job on adultery, 60 Johnson, Dr. S., 17, 18; on _Voyages to the South Seas_, 173 _Jok_, ancestral spirits, 57 Joustra, M., 85 _n._ 1 Jupagalk tribe of Australia, 74 Juris, the, of Brazil, 33 Kabyles, the, of North Africa, 119 Kachins of Burma, their fear of the ghosts of women dying in childbed, 135 _sq._ Kai, the, of German New Guinea, their fear of the ghosts of the slain, 124 _sq._ Kamilaroi tribe of New South Wales, 74 {182} Karens of Burma, their ideas as to sexual immorality, 44 _sq._; their dread of ghosts, 130 Kavirondo, the, of British East Africa, 65, 123 Kawars, the, 33 Kayans, the, of Borneo, 49, 50, 51