The standard manual of dynamos and practical application of dynamo-electric machinery
A 1915 technical handbook on dynamos and dynamo-electric machinery by Carl K. MacFadden and William D. Ray, published in Chicago by Laird & Lee for electricians, engineers and trade students. The plates are heavy-line schematic diagrams of field magnets, armatures and wiring circuits, labelled N, S, W with arrows for current direction, printed black on tan stock and usable as bold geometric line motifs.
