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
400 INVENTIONS OF NIKOLA TESLA . more sharply defined ; but I have not noted that , generally speak ing , the circles induced were very sharply 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… … Fig . 214 . glow , to which Prof . J . J . Thomson refers . But the circles were always in close proximity to the primary and were considerably easier produced when the latter was very close to the glass , much more so than would be expected assuming the action to be elee - Fig . 215 . tromagnetic…
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