The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas Commerford, 1856-1924, Tesla, Nikola, 1856-1943 · New York : The Electrical Engineer · leaf 87
)ieces c c lai^s or continues to manifest itself, which produces arotation of the armature hy riic repellent force between themore closely a]>proximatini; j)oints of maximum nui<;netic effect.This eflFect is continued hy the ivversal of current, the ]iolari-ties of field and armature i)einir… … ^^^^^Sr^r Fk;. 54.
Electric currents, Alternating · Electrical engineering
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