In this volume, Faraday boldly explores a new relation between magnetism and electricity. As we follow his narrative we can both witness and participate in his thinking, his questioning, and his insights. Includes introductions, notes, and supplementary diagrams. James Clerk Maxwell says: ?Faraday shows us his unsuccessful as well as his successful experiments, and his crude ideas as well as his developed ones, and the reader is tempted to believe that, if he had the opportunity, he too would be a discoverer. Every student should study Faraday for the cultivation of a scientific spirit.?