Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Johann Sigmund Hahn. Lithograph by E. Pönike & Sohn. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Johann Sigmund Hahn. Lithograph by E. Pönike & Sohn. Wellcome Collection. Source: Wellcome Collection.