The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com Empire Electric Company Rose High Frequency X-Ray Coil & X-Ray Tube Featured Collector Frank Jones Such beauty!!!! High Frequency X-Ray Tube A peak of the spark gap Tube holder.  No need to be stingy, everyone in the room will be X-Rayed this way! Retractable reel for tube connections.  Nice! Selector switch for X-Ray, High Frequency, or d'Arsonval Currents One might guess DA d'Arsonval and DT Diathermy...which means its a later model because of the term "Diathermy" not catching on for a while...interesting .. Remote control! This is interesting for technical reasons... Many thanks to Mark for sharing these beautiful photos!  (C) Jeff Behary, 2010