Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 73
Fig. 47. Fig. 48. practical importance, although the calculations of currents, elec-tromotive forces, losses, and efficiencies are slightly different inthe two cases. 36. Field excitation of direct-current motors. — Inasmuch as amotor always receives current from an outside source, tiiere is nosuch…
Dynamos · Electric motors
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-147-61.webp)
