Translator's preface; Author's dedication to Mr. William Crookes, F.R.S.; 1. Gauss's and Kant's theory of space; 2. Magnetic experiments; 3. Permanent impressions obtained of hands and feet; 4. Conditions of investigation; 5. Production of knots in an endless string; 6. Theoretical considerations; 7. Various instances of the so-called passage of matter through matter; 8. The phenomena suitable for scientific research; 9. Theoretical - the 'fourth dimension'; 10. An experiment for sceptics; 11. Writing through a table; 12. A 'fault' in the cable; 13. Phenomena described by others; Appendices.
In this book, translated by Charles Massey and published in London in 1880, an astrophysicist investigates spiritualism.