An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 563
40 50 60 70 80 90 100 110 120 130Amperes Fig. 354. — Characteristic curves of a ventilated railway motor with commu- tating poles. 346. Speed control. In the old days of small cars equippedwith a single motor the speed was controlled by a rheostat and the old-fashioned handbrakes which had beenused… … ELECTRIC TRACTION 505 Trolley Trolley
Electricity · Magnetism
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