This page contains interesting information from various Electrical Engineering literature related to technologies which were pioneered by Nikola Tesla.
A collection of dozens of articles and papers in 5 hard-cover volumes. Edited by Edward Molloy, published by George Newnes Ltd, London UK, 1934 (approx).
There are 2 Figures of interest in "Electrical Insulating Materials" by Say, M.G., from Volume 2, pages 643 - 651. Telsa is not mentioned in the text of the article.