FARADAY AS A DISCOVERER by John Tyndall Contents. Preface. Chapter 1. Parentage: introduction to the royal institution: earliest experiments: first royal society paper: marriage. Chapter 2. Early researches: magnetic rotations: liquefaction of gases: heavy glass: Charles Anderson: contributions to physics. Chapter 3. Discovery of Magneto-electricity: Explanation of Argo's magnetism of rotation: Terrestrial magneto-electric induction: The extra current. Chapter 4. Points of Character. Chapter 5. Identity of electricities; first researches on electro-chemistry. Chapter 6. Laws of electro-chemical decomposition. Chapter 7. Origin of power in the voltaic pile. Chapter 8. Researches on frictional electricity: induction: conduction: specific inductive capacity: theory of contiguous particles. Chapter 9. Rest needed--visit to Switzerland. Chapter 10. Magnetization of light. Chapter 11. Discovery of diamagnetism--researches on magne-crystallic action. Chapter 12. Magnetism of flame and gases--atmospheric magnetism. Chapter 13. Speculations: nature of matter: lines of force. Chapter 14. Unity and convertibility of natural forces: theory of the electric current. Chapter 15. Summary. Chapter 16. Illustrations of Character. Preface to the fifth edition. Daily and weekly, from all parts of the world, I receive publications bearing upon the practical applications of electricity. This great movement, the ultimate outcome of which is not to be foreseen, had its origin in the discoveries made by Michael Faraday, sixty-two years ago. From these discoveries have sprung applications of the telephone order, together with various forms of the electric telegraph. From them have sprung the extraordinary advances made in electrical illumination. Faraday could have had but an imperfect notion of the expansions of which his discoveries were capable. Still he had a vivid and strong imagination, and I do not doubt that he saw possibilities which did not disclose themselves to the general scientific mind. He knew that his discoveries had their practical side, but he steadfastly resisted the seductions of this side, applying himself to the development of principles; being well aware that the practical question would receive due development hereafter. During my sojourn in Switzerland this year, I read through the proofs of this new edition, and by my reading was confirmed in the conviction that the book ought not to be suffered to go out of print. The memoir was written under great pressure, but I am not ashamed of it as it stands. Glimpses of Faraday's character and gleams of his discoveries are there to be found which will be of interest to humanity to the end of time. John Tyndall. Hind Head, December, 1893.