VIII. Some Troubles of Sleep 663 IX. Dreams 669 X. Disorders of Memory 678 XI. Psychic Contagion 688 SECTION XIX _Disorders of Will_ I. Alcoholism 694 II. Drug Addictions 707 III. Suicide 713 IV. Grief 727 V. Doubting 732 VI. Responsibility and Will Power 738 {xiii} SECTION XX _Psychotherapy in Surgery_ I. Psychotherapy in Old-Time Surgery 746 II. Mental Influence Before Operation 749 III. Mental Influence and Anesthesia 753 IV. Mental Influence After Operation 759 APPENDICES I. Illusions 766 II. Religion and Psychotherapy 776 INDEX 781 {xiv} {xv} LIST OF ILLUSTRATIONS FIG. PAGE The Temple of Epidaurus as a health resort Facing page 9 1.--Expressions of the mouth 102 2.--Cortex of human brain illustrating complexity of the systems and plexuses of nerve fibers 109 3.--Small and medium-sized pyramidal cells of the visual cortex of a child twenty days old 110 4.--Series of sections showing the fine nerve endings and branchings of the first and second layer of the visual cortex of a child fifteen days old. 111 5.--First, second and third layer of the anterior central convolution of the brain of a child one month old 112 6.--Layers of the posterior central or ascending parietal convolution of a new-born child 112 7.--Diagram of cells of cerebral cortex 113 8.--Scheme of lower motor neuron 114 9.--Scheme of the visual conduction paths 115 10.--Schematic frontal section through the occipital lobe illustrating manifold connections in a single lobe 116 11.--Isolated cell from human spinal cord 117 12.--Neuron from the optic lobe of the embryo chick 118 13.--Deep layer of giant pyramidal cells of the posterior central or ascending parietal convolution of a child thirty days old 119 14.--Pyramidal cell of cerebral cortex of mouse 119 15.--Neuroglia cells of the fascia dentata, in the new-born rabbit 121 16.--Neuroglia cell from the subcortical layer of the cerebrum from which two processes go to a blood vessel 122