Licence: Public Domain Mark
Credit: Johann Nicolaus Raab. Mezzotint by J. F. Schmidt, 1761. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0004851/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Johann Nicolaus Raab. Mezzotint by J. F. Schmidt, 1761. Wellcome Collection. Source: Wellcome Collection.