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 214
the resistance of the discharg ing circuit should , of course , be so chosen that there are no oscillations . In operating devices on the above plan 1 have observed curi ous phenomena of impedance which are of interest . For instance if a thick copper bar be bent , as indicated in Fig . 128 , and… … Fig . 128 . is employed it is easy to obtain nodes on the bar , which are rendered evident by the different degree of brilliancy of the lamps , as shown roughly in Fig . 128 . The nodes are never clearly defined , but they are simply maxima and minima of potentials along the bar . This is probably…
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