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 185
h cases the streams will break forth more copiously . Also , the larger the ball with a given frequency , or the higher the frequency , the more will the ball have the advantage over the point . But , since a certain intensity of action is required to render the streams visible , it is obvious that… … Fig . 100 . Fig . 110 . capacity . Thus , for instance , by attaching to one terminal of the coil a small length of soiled wire , presenting many points and offering great facility to escape , the potential of the coil may be raised to the same value as by attaching to the terminal a polished ball…
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