Annual and General Meeting of the American Institute of Electrical Engineers Electrical World, The May 9th, 1891
image/svg+xml Nikola Tesla Writes (Additional Comments on Electro-Static Generators) Scientific American April, 1934
Nicola Tesla, Noted Scientist, Celebrates His 79th Birthday; Made Tests Here 1899 to 1906 Colorado Springs Evening Telegraph July 10th, 1936
