Inscription and numbering on a John Clark microscope.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Inscription and numbering on a John Clark microscope. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Inscription and numbering on a John Clark microscope. Wellcome Collection. Source: Wellcome Collection.