occurrence of, during opium habit, 84 occurrence of, during paretic dementia, 96 occurrence of, during phthisis, 80, 87 occurrence of, during pregnancy, 89, 109 occurrence of, during the puerperal state, 89 occurrence of, during renal diseases, 101 occurrence of, during rheumatism and gout, 105, 107 occurrence of, during sexual excitement, 89 occurrence of, during spasmodic diseases, 109 occurrence of, during states of exhaustion, 67 occurrence of, during syphilis, 106, 107 Insomnia, relation of, to states of the cerebral circulation, 57 relief of, by compression of the carotid arteries, 25 Iodide of potassium, treatment of asthma with, 110 Ipecac, treatment of asthma with, 101 Irritability of the brain, 53, 54 Itching of eczema, relieved with cannabis indica, 69 Jacobi, A., on wakefulness of children, 111 Japanese, use of massage among, 61 Jaundice, insomnia of, treatment with paraldehyde, 80 Jessen, case of hallucination caused by dreaming, 127 Joseph, St., dreams of, 142, 160 Judgment, suspension of, during sleep, 3 Kohlschütter, experiments of, to measure the depth of sleep, 16 Koumiss, 64 Lactic acid, hypnotic effects of, 72 Lactate of sodium, hypnotic effects of, 20, 72 Lactucarium, 88 Latent contracture, 221 Leeches, use of, 63, 93, 94 Lethargic form of artificial somnambulism, 220 Lethargy, 33 produced by excessive cold, 48 Lewin, observations of, on respiration during sleep, 6 experiments of, on oxidation in the tissues, 9 Liebermeister, experiments of, on oxidation in the tissues, 9 Life, normal, 4 possibility of intermissions in its active manifestation, 15 Light, interference of, with sleep, 40, 41 Liquors, effects of, 76 Lithæmia, a cause of insomnia, 106 Lithium bromide, 88 Lobelia, anti-spasmodic effects of, 71, 101 Lomi-lomi, 61 Lucid lethargy, 35 contrasted with somnambulic lethargy, 176 Lupulin, 90 Macario, case of somnambulism, reported by, 192 Mackinac, voyage to, 45 Macnish, case of somnambulic life, reported by, 206 Maladie du sommeil, 30 Malaria, treatment of insomnia, caused by, 72 Mania, use of chloral in, 82 Marmot, hibernation of, 48 temperature of, during hibernation, 8 Massage, 60, 109 Matter and mind, communication between, 22 Maury, A., classification of the varieties of somnambulism, 168 experience of, with table-rapping, 228 theory of, regarding forgetfulness of the events of somnambulism, 211 Measles, use of baths in, 74 Meat juice, 66 Memory, effect of physical exhaustion, 209 exaltation of, in somnambulism, 187 persistence of, in sleep, 3 relation of, to phenomena of somnambulism, 192 revival of, during disease and dissolution, 165 revival of, during dreaming, 162 Meningitis, 54, 57 Mental activity during sleep, 14 Mesnet, case of somnambulism related by, 196