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 420
ply defined , as Prof . J . J . Thomson has observed ; on the contrary , in my experiments they were broad and often the whole of the bulb or tube was illumi nated ; and in one case I have observed an intensely purplish ■ ■ P Fig . 214 . glow , to which Prof . J . J . Thomson refers . But the… … Fig . 215 . tromagnetic and considering the distance ; and these facts speak for an electrostatic effect . Furthermore I have observed that there is a molecular bom bardment in the plane of the luminous circle at right angles to the glass — supposing the circle to be in the plane of the primary
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