Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book
An elementary electricity textbook by Coates Walton Swoope, published by D. Van Nostrand in New York in 1903 for students and self-taught tradesmen. The 303 figures are line diagrams of dynamos, armatures, commutators and magnet poles, labeled with letters and current-direction arrows, offering designers stippled shading, schematic hatching and hand-lettered captions like "LAMPS".
