Studies in the Psychology of Sex, Volume 3 by Havelock Ellis is part of the HackerNoon Books Series. You can jump to any chapter in this book here . PREFACE TO SECOND EDITION PREFACE TO SECOND EDITION. This volume has been thoroughly revised for the present edition and considerably enlarged throughout, in order to render it more accurate and more illustrative, while bringing it fairly up to date with reference to scientific investigation. Numerous histories have also been added to the Appendix. It has not been found necessary to modify the main doctrines set forth ten years ago. At the same time, however, it may be mentioned, as regards the first study in the volume, that our knowledge of the physiological mechanism of the sexual instinct has been revolutionized during recent years. This is due to the investigations that have been made, and the deductions that have been built up, concerning the part played by hormones, or internal secretions of the ductless glands, in the physical production of the sexual instinct and the secondary sexual characters. The conception of the psychology of the sexual impulse here set forth, while correlated to terms of a physical process of tumescence and detumescence, may be said to be independent of the ultimate physiological origins of that process. But we cannot fail to realize the bearing of physiological chemistry in this field; and the doctrine of internal secretions, since it may throw light on many complex problems presented by the sexual instinct, is full of interest for us. HAVELOCK ELLIS. June, 1913. About HackerNoon Book Series: We bring you the most important technical, scientific, and insightful public domain books. This book is part of the public domain. Havelock Ellis (2004). Studies in the Psychology of Sex, Volume 3. Urbana, Illinois: Project Gutenberg. Retrieved October 2022 https://www.gutenberg.org/cache/epub/13612/pg13612-images.html This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org , located at https://www.gutenberg.org/policy/license.html .

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