A.E.J. Downing; member of staff of the Wellcome Museum.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: A.E.J. Downing; member of staff of the Wellcome Museum. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: A.E.J. Downing; member of staff of the Wellcome Museum. Wellcome Collection. Source: Wellcome Collection.