Electrical machinery; a practical study course on installation, operation and maintenance
A 1921 McGraw-Hill practical course by Fred Anzley Annett, teaching installation, operation, and maintenance of electric machinery to American tradesmen and shop students. Line drawings show wiring diagrams, dynamo and armature cross-sections, three-wire distribution circuits, switches, and lamp banks, giving designers clean schematic symbols, coil hatching, and arrowed current paths usable as technical ornament.
