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 175
le , it has been a good experimental machine . In operating an induction coil with very rapidly alternating currents , among the lirst luminous phenomena noticed are natur ally those presented by the high - tension discharge . As the num ber of alternations per second is increased , or as — the… … Fig . 99 . bring them about , but one may note live distinct forms of the discharge . First , one may observe a weak , sensitive discharge in the form of a thin , feeble - colored thread . ( Fig . 100a . ) It always occurs when , the number of alternations per second being high , the cur rent…
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