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 229
needed . In connection with the coil I use either the ordinary form of discharger or a modified form . In the former I have introduced two changes which secure some advantages , and which are ob vious . If they are mentioned , it is only in the hope that some experimenter may find them of use . One… … Fig . 133 . positions , and so doing away with the tedious process of frequent polishing up . The other change consists in the employment of a strong elec tromagnet x s , which is placed with its axis at right angles to the line joining the knobs A and b , and produces a strong mag netic field…
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