Produced by Turgut Dincer, John Campbell and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) TRANSCRIBER’S NOTE Italic text is denoted by _underscores_. Footnote anchors are denoted by [number], and the footnotes in a chapter have been placed at the end of that chapter. Some minor changes to the text are noted at the end of the book. WORKS BY BORIS SIDIS NERVOUS ILLS, THEIR CAUSE AND CURE. THE FOUNDATIONS OF NORMAL AND ABNORMAL PSYCHOLOGY. SYMPTOMATOLOGY, PSYCHOGNOSIS, AND DIAGNOSIS OF PSYCHOPATHIC DISEASES. THE CAUSATION AND TREATMENT OF PSYCHOPATHIC DISEASES. HUMAN PROGRESS. THE PSYCHOLOGY OF SUGGESTION. MULTIPLE PERSONALITY. PSYCHOPATHOLOGICAL RESEARCHES. AN EXPERIMENTAL STUDY OF SLEEP. PHILISTINE AND GENIUS. THE PSYCHOLOGY OF SUGGESTION. A STUDY OF GALVANOMETRIC DEFLECTIONS. THE NATURE AND CAUSATION OF THE GALVANIC PHENOMENON. NERVOUS ILLS _THEIR CAUSE AND CURE_ BY BORIS SIDIS, M.A., PH.D., M.D. MEDICAL DIRECTOR, THE SIDIS PSYCHOTHERAPEUTIC INSTITUTE, PORTSMOUTH, NEW HAMPSHIRE Author of “The Foundations of Normal and Abnormal Psychology,” “The Causation and Treatment of Psychopathic Diseases,” “Symptomatology, Psychognosis and Diagnosis of Psychopathic Diseases,” etc., etc. [Illustration: (Publisher’s colophon)] BOSTON RICHARD G. BADGER THE GORHAM PRESS COPYRIGHT, 1922, BY RICHARD G. BADGER All Rights Reserved Made in the United States of America Press of J. J. Little & Ives Company, New York, U. S. A. “_The thing in the world I am most afraid of is fear._” MONTAIGNE. INTRODUCTION In this volume I give a brief, popular account of some of my work in Psychopathology, or Abnormal Psychology for the last quarter of a century. I do not refer to my work on psychopathic reflexes, moment-consciousness, moment-thresholds, multiple personality and other subjects. The reader will find all these subjects in my other works. In this volume I make an attempt to simplify matters. I lay stress on the main factors and principles of that part of Abnormal Psychology that deals with the subject of nervous ills. It is to be regretted that some physicians, and among them many neurologists of excellent standing, hesitate to accept the work accomplished in the domain of Psychopathology, confusing the latter with what parades at present under the name of psychoanalysis. Thus a well known physician writes to me: