Prodigal-Genius-Biography-of-Nikola-Tesla_page_123

Prodigal-Genius-Biography-of-Nikola-Tesla | page 123 | https://thedailydialectics.com/pdfs/tesla/Prodigal-Genius-Biography-of-Nikola-Tesla/Prodigal-Genius-Biography-of-Nikola-Tesla.pdf

substituted for air in his tubes other gases, including mercury vapor, and observed the peculiar color and other effects they yielded. Noting the variety of colors the various gases, and even air, showed under different pressures, Tesla suspected that not all of the energy radiated was given off as…