The Turn Of The Century Electrotherapy Museum

Experimental Pancake Coil for Brush Discharges

Winding pancake coil...

500 turns

Coil embedded in paraffin wax / boiled linseed oil / kerosene mixture
placed above primary coil from Thomas Stanley Curtis Reproduction

Large volume of violet brush discharges, sparks are roughly the same length and colour


Sumo, Ju

A similar but earlier spark gap diathermy Prostate Electrode