Edison says with regard to this work: "When the X-ray came up, I made the first fluoroscope, using tungstate of calcium.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin
The same journal in its issue of April 1, 1896, shows an Edison fluoroscope in use by an observer, in the now familiar and universal form somewhat like a stereoscope.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin
With the lead-glass bowl removed, the X-ray tube sent forth its wonderful invisible radiation and made the back of the fluoroscope glow with light.
"Master Tales of Mystery, Volume 3"
Collected and Arranged by Francis J. Reynolds