Licence: Public Domain Mark
Credit: Georg Prochaska. Halftone after a line engraving. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0004798/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Georg Prochaska. Halftone after a line engraving. Wellcome Collection. Source: Wellcome Collection.