Licence: Public Domain Mark
Credit: Leopold Auenbrugger and his wife. Photograph by V.A. Heck. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0025981/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Leopold Auenbrugger and his wife. Photograph by V.A. Heck. Wellcome Collection. Source: Wellcome Collection.