Spinal irritation, 62 Spirit of chloroform, 81 Spiritual circle, manifestations in, 227 Stewart, Dugald, observation of, 43 Stimulants after parturition, 109 in fever, 105 nervous, 59 Stramonium, 70, 101 Strümpell, observations of, regarding sleep produced by suppression of sensation, 18 Strychnia, 105 Stupor produced by excessive heat or cold, 47 Subsultus tendinum, treatment of, with musk, 67 Suction, involuntary, during infantile sleep, 12 Suppression of sensation, a cause of sleep, 18 Swedish movement cure, 61 Sympathetic nerves, affections of, 39, 50 Table-rapping, method of communication in, 228 Tannate of cannabin, 68 Tartar emetic, use of, in asthma, 101 use of, in delirium tremens, 98 use of, in fever, 104 use of, with opium, 108 Taste, relation of, to insomnia, 43 Tea, effect of, upon the brain, 54 Telegraphy without a wire, through water, 147 Telepathy, investigation of, by the Society for Psychical Research, 149 Temperature, of the body, during sleep, 7 sense of, 43 Thapsia, 63 Theory of sleep, Obersteiner’s, 20 Pflüger’s, 21 Preyer’s, 20 Thirst, 2 Thompson, Sir William, his doctrine concerning a sixth sense, 43 Tickling, effect of during sleep, 12 Tobacco, anti-spasmodic effect of, 71, 99, 101 Transfer of perceptions, 217 Trousseau, observations of, on the pulse during sleep, 6 Tuberculosis of the cerebral membranes, 55 Tully’s Powder, 67 Tumors of the brain, 55 Turkish baths, 60 Turpentine, 63 Typhoid fever, insomnia during, 64 treatment of, with baths, 74 treatment of, with musk, 68 treatment of, with Tully’s Powder, 67 Typhus fever, treatment of, with musk, 68 Unconsciousness, produced by compression of the carotid arteries, 27 relation of, to modifications of the cerebral circulation, 25 Urea, elimination of, during sleep, 9 Urine, secretion of, during sleep, 9 Uterine colic, 81 Valerian, 68, 109 Valerianate of ammonia, 68 of zinc, 68 Venereal act, a cause of sleep, 19 Vierordt, observations of, on the duration of sleep, 110 Visions, character of, 119 of the ancient prophets, 161 Voit, observations of, on oxidation in the tissues, 9 on respiration during sleep, 6 Volition, cessation of, during sleep, 3 Wakefulness, 38 causes of, 39 dependence of, upon instability of cerebral protoplasm, 22 Warburton, Rev. Canon, clairvoyant dream of, 146 Weariness, a cause of sleep, 1 Wharton and Stillé, on sleep-drunkenness, 181 Whooping-cough, treatment of, with belladonna, 69 Wind, effect of, upon sleep, 45 Wine, effects of, 76 use of, in the insomnia of old age, 78 Ziemssen, von, on the use of baths, 73 FOOTNOTES: [1] Rosenbach, _Zeitschr. f. klin. med._ 1881. _Brain_, Vol. IV, p. 138. [2] Alfred Maury, _Le Sommeil et les Rêves_, Chap. IV.