Licence: Public Domain Mark
Credit: Leonhard Euler. Stipple engraving by B. Holl after A. Lorgno. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0001798EL/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Leonhard Euler. Stipple engraving by B. Holl after A. Lorgno. Wellcome Collection. Source: Wellcome Collection.