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 223
HIGH FREQUENCY AND HIGH POTENTIAL CURRENTS . 203 with the discharge of a Holtz or Wimslmrst machine — that other interesting appliance so dear to the experimenter . What a differ ence there is between these phenomena ! And yet , had I made the necessary arrangements — which could have been made… … Fig . 131 Fig . 130 . hidden from your view and only two knobs exposed , even the keenest observer among you would find it difficult , if not impos sible , to distinguish from those of an influence or friction ma chine . This may be done in many ways — for instance , by oper ating the induction…
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