A practical treatment emphasizing the use of electricity in specific industrial devices rather than theory, although basic electrical equations are given with example calculations. Contents: electrical algebra, fundamentals of electricity, wiring, magnetism, armature winding, generators, motors, controllers, geometry and trigonometry, alternating current, a-c circuits, transformers, polyphase systems, alternators, alternating-current motors, stator winding, multispeed induction motors, a-c controllers, electrical instruments, electron tubes, welding systems, illumination, electrical drawing.