Translator's Preface.
Author's Dedication to Mr. William Crookes, F.R.S.

Chapter 1.
Gauss's and Kant's Theory of Space—The Practical Application of the Theory in Experiments with Henry Slade—True Knots produced upon a Cord with its ends in view and sealed together.

Chapter 2.
Magnetic Experiments—Physical Phenomena—Slate-Writing under Test Conditions.

Chapter 3.
Permanent Impressions obtained of Hands and Feet—Proposed Chemical Experiment—Slade's Abnormal Vision—Impressions in a Closed Space—Enclosed Space of Three Dimensions open to Four-Dimensional Beings.

Chapter 4.
Conditions of Investigation—Unscientific Men of Science—Slade's Answer to Professor Barrett.

Chapter 5.
Production of knots in an endless string—Further experiments—Materialisation of hands—Disappearance and reappearance of solid objects—A table vanishes, and afterwards descends from the ceiling in full light.

Chapter 6.
Theoretical considerations—Projected experiments for proof of the fourth dimension—The unexpected in nature and life—Schopenhauer’s “Transcendent Fate.”

Chapter 7.
Various Instance of the so-called passage of Matter through Matter.

Chapter 8.
The Phenomena suitable for Scientific Research—Their Reproduction at Different Times and Places—Dr. Friese's and Professor Wagner's Experiments in Confirmation of the Author's.

Chapter 9.
Theoretical; "The Fourth Dimension”—Professor Hare's Experiments—Further Experiments of the Author with Slade—Coins Transferred from Closed and Fastened boxes—Clairvoyance.

Chapter 10.
An Experiment for Sceptics—A Wager—Slade's Scruples—A Rebuke by the Spirits—An Unexpected Result—Captious Objections.

Chapter 11.
Writing through a Table—A Test in Slate-Writing conclusively Disproving Slade's Agency.

Chapter 12.
A “Fault " in the Cable— A Jet of Water—Smoke—"Fire Everywhere"—Abnormal Shadows—Explanation upon the Hypothesis of the Fourth Dimension—A Séance in Dim Light—Movement of Objects— A Luminous body.

Chapter 13.
Phenomena Described by Others.

Appendicies
Appendix A. The Value of Testimony in Matters Extraordinary.
Appendix B. Evidence of Samuiel Bellachini, Court Conjurer at Berlin.
Appendix C. Admissions by John Nevil Maskelyne, and other Professional Conjurers.
Appendix D. Plate X.