Nikola Tesla Tesla Coil Transcendental

In 1856 Lord Kelvin had exposed the theory of the condenser discharge, but no practical application of that important knowledge was made. I saw the possibilities and undertook the development of induction apparatus on this principle. My progress was so rapid as to enable me to exhibit at my lecture in 1891 a coil giving sparks of five inches.

But a still greater future awaits it. When in 1900 I obtained powerful discharges of 100 feet and flashed a current around the globe, I was reminded of the first tiny spark I observed in the Grand Street laboratory and was thrilled by sensations akin to those I felt when I discovered the rotating magnetic field.

~ My Inventions : Autobiography of Nikola Tesla ~