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 391
% mo Fi(.. r.ts. ber and waving the tube about we ])roduce all kinds (»f designsin luminous lines. So by way of amusement I take a straightlong tube, or a s(piare one, or a square attached to a straight tube,and by whirling thcni about in the hand, I imitate the s])okes ofa wheel, a (iramme…
Electric currents, Alternating · Electrical engineering
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