The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com Edwards Instrument Company Tesla Coil Experiments Edwards machine, with newly made  olive tip discharger Spark Posts and Interrupter Top panel Sparks! Lighting a Geissler Tube Lighting a Maltese Cross Crookes Tube Lighting an Oscilloscope Tube Lighting an X-Ray Tube (inverse discharge from high frequency AC) More sparks!  Ozone!