Transcriber’s Notes Obvious typographical errors have been silently corrected. Variations in hyphenation and accents and all other spelling and punctuation remains unchanged. The quotation from Ballad of Reading Gaol, (Chapter VIII) has been corrected from And Sleep will not lie down but walks And wild-eyed cries to time. to And Sleep will not lie down but walks Wild-eyed and cries to time. Footnotes are located at the end of the relevant paragraphs. Italics are represented thus _italic_. [Illustration: BOLTON HALL “THE PSYCHOLOGY OF SLEEP”] THE PSYCHOLOGY OF SLEEP BY BOLTON HALL, M.A. Author of “Three Acres and Liberty,” “Things as They Are,” “Free America,” etc. With an Introduction BY EDWARD MOFFAT WEYER, Ph.D. Professor of Philosophy, Washington and Jefferson College [Illustration] NEW YORK MOFFAT, YARD AND COMPANY 1917 Copyright, 1911, by MOFFAT, YARD AND COMPANY NEW YORK _All rights reserved_ Published October, 1911 THE QUINN & BODEN CO. PRESS RAHWAY, N. J. TO THE MEMORY OF THE REVEREND DR. JOHN HALL WHO PREACHED FROM THE WORD WHAT I TEACH FROM THE WORLD INTRODUCTION At the request of the author, I have read this book in proof sheets, and, from the point of view of one interested in psychology, I have suggested many amendments which have all, I think, been adopted. As will be seen by the intelligent reader, the best sleep involves more than a normal body; it involves healthy thought and the application to our daily lives of the moral principles laid down by our great spiritual teachers. The cure of sleeplessness has hitherto been left largely to the physician, who is not always a specialist on that subject and who will welcome a treatise that will enable his patient to co-operate with his restorative measures. Mr. Hall has already shown in _Three Acres and Liberty_ and in _The Garden Yard_ his ability to put into clear, popular language and readable form scientific truths that non-scientific people need to know and wish to learn.