Written for general readers, this volume traces the history of electrical science and magnetism, explains the theory of currents and generators, atmospheric electricity and measurement, and describes how the telegraph sends and receives messages. Gray, an inventor who contested the telephone with Alexander Graham Bell, closes with the newest marvels of the 1890s, among them Crookes tubes and X-rays.
Popular science from a working inventor at the dawn of the electrical age. Download the free EPUB.