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 246
es may be used conveniently . I think it best at this juncture to bring before you a phe nomenon , observed by me some time ago , which to the purely scientific investigator may perhaps appear more interesting than any of the results which I have the privilege to present to you this evening . It… … Fie . 142 . Fig . 141 aluminum , the brush has but an ephemeral existence , and can not , unfortunately , be indefinitely preserved in its most sensi tive state , even in a bulb devoid of any conducting electrode . In studying the phenomenon , by all means a bulb having no leading - in wire should…
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