Seen here is a "medical curiosity" the "treatment" of the right kidney with the TEFRA-electrode "Großverstärker"="Big amplifier". This procedure, known as High-frequency-ozone-therapy was, before WW2, an accepted part of self-therapy in many households, but then lost its importance. But the generator and a myriad of sometimes very bizarre electrodes for many different purposes are produced to this day by TEFRA. The glow stems from the neon contained in this electrode.
