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 197
lamp capable of giving any desired candle power is provided . The success of lamps of this kind would depend largely on the selection of the light - giving bodies contained within the bulb . Since , under the conditions described , refractory bodies — which are very poor conductors and capable of… … Fig . 114 . Fig . 115 . filament or button of refractory material , be perfectly well ex hausted — that is , as far as it can be done by the use of the best apparatus — the heating would be much less intense , and that in a perfect vacuum it could not occur at all . This is not confirmed by my…
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