| Page |
| Introduction | 3 |
| Contents | 5–6 |
| Preface | 7–10 |
| Introductory Essay | 11–21 |
| CHAPTER I—DEVICES BY MEANS OF WHEELS AND WEIGHTS— |
| Wilars De Honecort; A Repetition of Wilars Honecort's plan; Leonardo da Vinci; A. Capra's Device; The Device of Dixon Vallance; Furman's Device; Schirrmeister's "Mechanical Movement;" James Ferguson's Device; B. Belidor's Device; Desagulier's Proposition on the Balance; John Haywood's Device; Explanation of the Failure of Wheels and Weights Devices to Accomplish Perpetual Motion | 22–67 |
| CHAPTER II—DEVICES BY MEANS OF ROLLING WEIGHTS AND INCLINED PLANES— |
| Device by Mercury in Inclined Glass Tube and Heavy Ball on Inclined Plane; Series of Inclined Planes; Devices by Oscillating Trough and Cannon Balls; Unpublished Inclined Plane and Weights Devices Noted by the Author | 68–75 |
| CHAPTER III—HYDRAULIC AND HYDRO-MECHANICAL DEVICES— |
| Enbon and Anderson's Pump; Device of "Ed. Vocis Rationis;" BÖckler's Plates; John Linley's Hydraulic Device; Device of Author of the "Voice of Reason;" An Italian Device; P. Valentine Stansel's Device; Vogel's Device; A Water Wheel-Driven Pump; "A Journeyman Mechanic's" Device; James Black's Device; Archimedean Screw and Liquid; John Sims's Problem; A Perpetual Pump, by an Unknown Inventor; Explanation of the Failure of Hydraulic and Hydro-Mechanical Devices to Accomplish Perpetual Motion | 76–117 |
| CHAPTER IV—PNEUMATIC, SIPHON AND HYDRO-PNEUMATIC DEVICES— |
| The Hydrostatical Paradox; Pickering's Device; Stuckey's Device; Prof. George Sinclair's Device; Jacob Brazill's Device; LÄserson's Device; Von Rathen & Ellis' Device; Richard Varley's Device; Siphon and Funnel Device; Orchard's Vacuum Engine; Robert Copland's Device; Eaton's Perpetual Siphon; Legge's Hydro-Pneumatic Power Device; Waterblowing Machine; Device by Means of Buoyancy Through Media of Different Densities; Device by Compressible and Distensible Bags in Liquid; George Cunningham's Mercurial Pneumatic Device; Explanation of the Failure of Pneumatic, Siphon and Hydro-Pneumatic Devices to Accomplish Perpetual Motion | 118–162 |
| CHAPTER V—MAGNETIC DEVICES— |
| A Magnetic Pendulum; Magnetic-Driven Wheel; Mackintosh's Experiment; Spence's Device; Joannis Theisneri's Semi-Circle; Device of Dr. Jacobus | 163–174 |
| CHAPTER VI—DEVICES UTILIZING CAPILLARY ATTRACTION AND PHYSICAL AFFINITY— |
| Ludeke & Wilcken's Device; the Jurin Device; Sir William Congreve, Notice of; His Perpetual Motion Devices and Writings | 175–194 |
| CHAPTER VII—LIQUID AIR AS A MEANS OF PERPETUAL MOTION— |
| Liquefaction of Air; Explanation of Conservation of Energy Applied to; Perpetual Motion by Means of Liquid Air Pompously Heralded; Failure Explained | 195–196 |
| CHAPTER VIII—RADIUM AND RADIO-ACTIVE SUBSTANCES CONSIDERED AS A CONCEIVED SOURCE OF PERPETUAL MOTION— |
| Perpetual Emanation of Energy; Radium Clock by Lord Rayleigh (Hon. R.J. Strutt); Lord Rayleigh Not a Perpetual Motion Worker but Thoroughly Scientific | 197–199 |
| CHAPTER IX—PERPETUAL MOTION DEVICES ATTEMPTING ITS ATTAINMENT BY A MISCONCEPTION OF THE RELATION OF MOMENTUM AND ENERGY— |
| Works of Tyros Known to Author; Momentum Defined, Differentiated, Measured and Explained; Energy Defined, Differentiated, Measured and Explained; Explanation by Author of Common Misconception of the Relation of Momentum and Energy and Attempts to thus Realize Perpetual Motion; the Fallacy Explained by Illustrations of Energy Required for and Represented by Acceleration and Retardation of Velocity; Property of Numbers Relating to; Arithmetical Progression Illustration | 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— |
| Intense Interest Caused by; Notice of Marquis of Worcester and Councillor Orffyreus and Periods in Which They Lived; Description by Marquis of Worcester of the Essentials of His Claimed Inventions; Excerpts From Remarks of Councillor Orffyreus on His Claimed Invention; Dedication by Councillor Orffyreus to God, the Public, to Men of Learning and to Himself as the Discoverer; Article Concerning the Orffyrean Wheel Published 1720 in Gentlemen's Magazine; Criticism by "A Constant Reader" of Attitude of W. Kenrick Concerning the Orffyrean Wheel; Article by Rev. J.T. Desagulier Concerning the Device of Marquis of Worcester and the Orffyrean Wheel; Excerpt from Dr. William Kenrick's Lecture on Perpetual Motion; De la Hire's Remarks Concerning Perpetual Motion; Letter from Prof. 's Gravesande to Sir Isaac Newton; Animadversions of Prof. Alliman on the Neglect of the Orffyrean inventions; Dr. Charles Hutton's Scientific Works and Notice of the Orffyrean Wheel; Remarks by the Author on the Histor
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