Licence: Public Domain Mark
Credit: Sir Alexander Ogston. Photograph by R.M. Morgan Ltd. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0026928/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Sir Alexander Ogston. Photograph by R.M. Morgan Ltd. Wellcome Collection. Source: Wellcome Collection.