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 290
nfine as much as possible the heat to the electrode by preventing the circulation of the gas in the bulb . If a very small bulb be taken , it would confine the heat better than a large one , but it might not be of sufficient capacity to be operated from the coil , or , if so , the glass might get… … Fig . 157 . Pig . 158 . tamed in the globe . This arrangement is illustrated in Fig . 157 . The globe r . has in this case a large neck n , allowing the small bulb b to slip through . Otherwise the construction is the same as shown in Fig . 147 , for example . The small bulb is conveni ently…
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