The inventions, researches and writings of Nikola Tesla : with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas C, Tesla, Nikola · The Electrical Engineer · leaf 236
frequencies , but much less satisfactorily . When two wires , attached to the terminals of the coil , are set at the proper distance , the streams between them may be so in tense as to produce a continuous luminous sheet . To show this phenomenon I have here two circles , c and c ( Fig . 139 ) , of… … Fig . 139 . the circles may be placed in the same plane , coinciding as nearly as possible . When the light in the room is turned off and the coil set to work , you see the whole space between the wires uni formly tilled with streams , forming a luminous disc , which could be seen from a…
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