H. H. Dale, Adventures in physiology...
Licence: In copyright
Credit: H. H. Dale, Adventures in physiology... Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0022413/full/800%2C/0/default.jpg)
Licence: In copyright
Credit: H. H. Dale, Adventures in physiology... Wellcome Collection. Source: Wellcome Collection.