Licence: Public Domain Mark
Credit: Handbuch der Elektrotherapie / von Wilhelm Erb. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0074971/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Handbuch der Elektrotherapie / von Wilhelm Erb. Wellcome Collection. Source: Wellcome Collection.