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 412
CHAPTER XXX . Alternate Current Electrostatic Induction Apparatus . 1 About a year and a half ago while engaged in the study of alternate currents of short period , it occurred to me that such currents could he obtained by rotating charged surfaces in close proximity to conductors . Accordingly I… … Fig . 208 . of experimental apparatus of which two are illustrated in the accompanying engravings . In the apparatus shown in Fig . 208 , a is a ring of dry shel lacked hard wood provided on its inside with two sets of tin - foil coatings , a and b , all the a coatings and all the b coatings being…
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