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 283
anner , the button was taken so large that a perceptible time had to elapse before , upon grasping the bulb , it could be rendered incandescent . The contact with the bull ) was , of course , quite unnecessary . It is easy , by using a rather large bulb with an exceedingly small electrode , to ad… … Fig . 153 . Fig . 154 . In another experiment , when phosphorescence was excited , a similar bulb was used . Here again , originally , the potential was not sufficient to excite phosphorescence until the action was in tensified — in this case , however , to present a different feature , by touching…
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