Licence: Public Domain Mark
Credit: Jean Conrad Escher de la Linth. Line engraving by A. Bouvier. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0001785/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Jean Conrad Escher de la Linth. Line engraving by A. Bouvier. Wellcome Collection. Source: Wellcome Collection.