Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
Credit: Ivan Petrovich Pavlov. Ting Low. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/B0008903/full/800%2C/0/default.jpg)
Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
Credit: Ivan Petrovich Pavlov. Ting Low. Source: Wellcome Collection.