A few years ago I bought this interesting piece of medical equipment history. It is an induction coil with interchangeable gas filled glass electrodes. It was used “treat” all kinds of medical conditions. The handbook shows a large variety of uses this device could be used on, against and for. There are electrodes for your hair, eyeballs, vaginal electrodes and many even weirder ones. All the electrodes from the handbook are pictured at the end of the video.
I think it is a medical quack.
Nevertheless it is fun to show this thing at parties an zap people whit it.
I have the handbook scanned somewhere and will add it to this post any time soon. In the meantime here is a video of me presenting this thing.