Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise
A multi-volume self-instruction manual in electrical engineering by Nehemiah Hawkins, published by Theo. Audel & Co. in New York in 1914 and written in question-and-answer form for working engineers, electricians and students. The pictures are heavy-line diagrams of wiring circuits, bells, telegraph keys and sounders, relays and battery cells, with lettered callouts and ground symbols, usable as schematic line art, technical lettering and simple mechanical silhouettes.
