Perpetual Motion Comprising a History of the Efforts to Attain Self-Motive Mechanism with a Classified, _ILLUSTRATED_ Collection and Explanation of the Devices Whereby it Has Been Sought and Why They Failed, and Comprising Also a Revision and Re-Arrangement of the Information Afforded by "Search for Self-Motive Power During The 17th, 18th and 19th Centuries," London, 1861, and "A History of the Search for Self-Motive Power from the 13th to The 19th Century," London, 1870, by Henry Dircks, C. E., LL. D., Etc. [Illustration] BY PERCY VERANCE Copyright 1916 By 20th Century Enlightenment Specialty Co. CONTENTS For Summarized Table of Contents, see page 358 _et seq._ Page Introduction 3 Preface 7-10 Introductory Essay 11-21 CHAPTER I. Devices by Means of Wheels and Weights 22-67 CHAPTER II. Devices by Means of Rolling Weights and Inclined Planes 68-75 CHAPTER III. Hydraulic and Hydro-Mechanical Devices 76-117 CHAPTER IV. Pneumatic Siphon and Hydro-Pneumatic Devices 118-162 CHAPTER V. Magnetic Devices 163-174 CHAPTER VI. Devices Utilizing Capillary Attraction and Physical Affinity 175-194 CHAPTER VII. Liquid Air as a Means of Perpetual Motion 195-196 CHAPTER VIII. Radium and Radio-Active Substances Considered as a Conceived Source of Perpetual Motion 197-199 CHAPTER IX. Perpetual Motion Devices Attempting Its Attainment by a Misconception of the Relation of Momentum and Energy 200-211 CHAPTER X. The Alleged Inventions of Edward Sommerset, Sixth Earl and Second Marquis of Worcester, and of Jean Ernest Eli-Bessler (Councillor) Orffyreus 212-255 CHAPTER XI. Conservation of Energy. A Discussion of the Relation of the Doctrine of Conservation of Energy, and the Possibility of Perpetual Motion 256-269 CHAPTER XII. Will Perpetual Motion Ever Be Accomplished? A Discussion by the Author, with a Review of the Opinions of Eminent Scientists on the Subject 270-357 PREFACE.