Galvanic anti-neuralgic headband made up of a series of 24 alternate zinc and copper discs mounted onto a felt and ribbon band. The headband was tied around the head, with the discs resting on the temples, where perspiration would act on the discs by producing a mild galvanic current

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Galvanic anti-neuralgic headband made up of a series of 24 alternate zinc and copper discs mounted onto a felt and ribbon band. The headband was tied around the head, with the discs resting on the temples, where perspiration would act on the discs by producing a mild galvanic current. Wellcome Collection. Source: Wellcome Collection.