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 247
d to it , so that two entirely independent compartments are formed , as indicated in the drawing . When the bulb is in use the neck n is provided with a tinfoil coating , which is connected to the generator and acts inductively upon the moderately rare fied and highly conducted gas inclosed in the… … Fig . 143 . through it very small , and to blow the sphere s very thin . It is of the greatest importance that the sphere s be placed in the centre of the globe Z . Figs . 143 , 144 and 145 indicate different forms , or stages , of the brush . Fig . 143 shows the brush as it first appears in a bulb…
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