Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise ..
A practical question-and-answer manual on steam engineering and electricity by Calvin F. Swingle, published in Chicago by F. J. Drake in 1913 for working engineers, firemen, and licence candidates. The line engravings are sectional views of valves, governors, turbines, and pumps in fine crosshatch, plus schematic diagrams of armatures, field magnets, and wiring with directional arrows.
