Clark, observations of, on the sleeping dropsy, 30 Codeia, 85 Codeine, 88 Coffee, effects of, upon the brain, 54 Cold, a nervous sedative, 73 Cold baths, 73 Cold, excessive, a cause of stupor, 47 Colic, uterine, relief of, 81 Color-blindness, effect of hypnotism upon, 223 Coma, 32 Coniine, 91 Conium, 90, 95 Consciousness, duration of the sensations required for its excitement, 23 state of, during sleep, 14 Convulsions, excited by compression of the carotid arteries, 27 treatment of, 110 Cough, spasmodic, treatment with spirit of chloroform, 82 Counter irritants, 62 Croton oil, 63 Cups, counter irritation with, 63, 93 Curci, observations of, regarding belladonna, 69 regarding morphia, 85 Cutaneous disorders, causes of insomnia, 55 DaCosta, on lithæmia, 106 Darkness, favorable to sleep, 18 Day and night, alternation of, a cause of sleep, 17 Death, apparent, 34 test of, 35 Degeneration of the brain, 55 Demme, observations of, on bodily temperature in sleep, 7 Delirium, 54 excited by hyoscyamus, 70 excited by stramonium, 71 of exhaustion, 77 treatment of, with musk, 67 Delirium tremens, treatment of, with alcohol, 77 with bromides, 89 with capsicum, 77 with chloral, 82 with digitalis, 67 Delusions, caused by dreams, 128 Depressing emotions, a cause of sleep, 19 Diagram, illustrating the stages of sleep, 4 the varieties of somnambulism, 172 Digitalis, indirectly hypnotic effect of, 66 treatment of delirium tremens with, 98 Diminution of energy, represented by sleepiness, 2 Disease and dissolution, revival of memory in, 165 Dover’s powder, 67, 100, 104, 110, 112 Double consciousness, 204, 206 Dreams, 116 analysis of, 133 at the moment of waking, 14 brevity of, 15 causes of, 118 cause of special vividness of, 134 clairvoyant, 146, 148, 149 coherence of, 131 definition of, 120 dependence of, upon partial sleep of the brain, 11 duration of, 135 excited by gustatory sensation, 43, 125, 130 by heat, 43 by painful diseases, 141 by sensory impressions during sleep, 29 by sounds, 41 incoherence of, 133 intellectual combinations in, 131 mode of their production, 124 primitive belief in the divine origin of, 160 prophetic, 142, 143 recollection of, 140 relation of, to depth of sleep, 4 relation of, to waking hallucinations, 126 resemblance of, to the mental processes of insanity, 133 revival of memory in, 162 somnambulic, 178 state of volition during, 141 suggested by external impulses, 125, 130 theory of, 116 waking, 123 Dropsy, treatment of, with digitalis, 66 Dumontpallier, case of self-hypnotism related by, 219 Duration of sleep, 110 Dyspnœa, cardiac, 98 treatment of, with digitalis, 66 Dyspeptic insomnia, 104