A popular survey traces the development of electrical science from early observations of lightning through foundational experiments and apparatus such as electrostatic machines and the Leyden jar, then explains fundamental concepts—electric current, magnetism, induction, accumulators, dynamos—and describes technologies built on them, including motors, lighting, heating, telegraphy, telephony, wireless, submarine cables, and electrochemical processes. It also examines medical uses, X-rays, ozone, agricultural electro-culture, industrial electrolysis, ignition systems, and wartime applications, combining technical descriptions, diagrams, and practical examples for a general readership.