John Munro opens The Story of Electricity with a schoolboy rubbing sealing-wax on his sleeve—a homely image that grounds the entire history of electrical science in a single, repeatable experiment. From this starting point, Munro organizes his survey around the sources of electrical energy: friction, chemistry, heat, and magnetism. Each source becomes a chapter, and each chapter builds toward the practical applications that, by 1915, had made electricity essential to daily life. The book’s preface frames this progress as a product solely of nineteenth-century achievement, and the chapters that follow deliver on that promise with detailed descriptions of telegraphy, lighting, power transmission, and electric railways.

From Sealing-Wax to Dynamos

Munro’s opening image—a boy rubbing sealing-wax to attract dust—is not just a charming anecdote. It establishes a pattern: every major electrical phenomenon is introduced through a concrete, often domestic, example. Friction electricity begins with amber and cat’s fur; chemical electricity with Volta’s pile of zinc and copper discs; heat electricity with thermocouples; magnetism with the lodestone. The book then traces how each of these humble origins was scaled into industrial technology. The dynamo, for instance, is presented as the culmination of magnetic electricity, transforming mechanical energy into electric current with efficiencies of 75 to 90 percent. Munro’s narrative arc moves steadily from the small and observable to the large and engineered, making the science feel accessible without oversimplifying the engineering.

The Practical Shape of Progress

Munro’s account of electric railways reveals his method: he describes not just the final system but the sequence of failed or partial solutions that preceded it. The first Berlin tramway of 1879 used insulated rails as conductors, but leakage to ground proved problematic. By 1881, Siemens had switched to an overhead wire with a rolling trolley contact. Munro then catalogs variations—the three-wire system at Bangor, Maine; accumulator-assisted switching; buried conductors; conduit slots—each a response to a specific engineering constraint. This incremental, problem-solving approach gives the book a practical texture. The reader sees not a smooth triumph but a series of adjustments, each dictated by the stubborn realities of insulation, weight, or cost.

A Voice Anchored in 1915

The book’s language and assumptions are firmly rooted in its moment. Munro writes that electricity is “so essential to the industrial organization which embraces every dweller in a civilized land” that knowledge of its principles should be part of “education in its truest sense.” The confidence in progress is unshaken: the nineteenth century is presented as a closed chapter of achievement, and the early twentieth as a time of refinement and expansion. Yet the text also contains quiet markers of its era—the Sultan of Turkey’s electric carriage, the mention of “wireless telegraphy” as a recent marvel, the careful explanation of the three-wire system. These details give the book a specific historical flavor, reminding the reader that this “story” was written while many of its technologies were still new.

Munro’s The Story of Electricity rewards a reader who pays attention to the small experiments that open each chapter. The sealing-wax, the pile, the thermocouple, the lodestone—these are not just historical curiosities. They are the conceptual seeds from which the dynamo, the telegraph, and the electric railway grew. Reading with an eye for these origins reveals the book’s deeper argument: that every grand application rests on a simple observation, and that the distance from a boy’s sleeve to a city’s tramway is bridged by patient, incremental engineering.