Reaching High Frequencies

“It would take too much time, and it would lead us too far from the subject presented this evening, to reproduce all these forms, but it seems to me desirable to show you one of them. It is a brush discharge, which is interesting in more than one respect. Viewed from a near position it resembles much a jet of gas escaping under great pressure. We know that the phenomenon is due to the agitation of the molecules near the terminal, and we anticipate that some heat must be developed by the impact of the molecules against the terminal or against each other. Indeed, we find that the brush is hot, and only a little thought leads us to the conclusion that, could we but reach sufficiently high frequencies, we could produce a brush which would give intense light and heat, and which would resemble in every particular an ordinary flame, save, perhaps, that both phenomena might not be due to the same agent — save, perhaps, that chemical affinity might not be electrical in its nature."

– Nikola Tesla, Page 205, “The Inventions, Researches and Writings of Nikola Tesla, with Special Reference to His Work in Polyphase Currents and High Potential Lighting” by Martin, Thomas Commerford, 1856-1924; Tesla, Nikola, 1856-1943

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The Borderlands Of Nikola Tesla’s Resonant Transformer