Harper's Electricity Book for Boys

This practical handbook introduces basic electrical principles and step-by-step, illustrated projects aimed at young readers, covering cells and batteries, switches, magnets and induction coils, annunciators and bells, current detectors and galvanometers, resistance and Ohm’s law, the telephone and telegraph including wireless, dynamos and motors, electroplating, frictional machines, and household uses of electric light, heat, and power. Emphasis is placed on inexpensive tools, construction techniques, safety precautions, and clear explanations that link theory to hands-on experiments, with a concluding glossary of electrical terms and practical formulas for materials and mixtures.