Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Mechanised Leech, invented by Messrs. Kidsten & co. 1850. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Mechanised Leech, invented by Messrs. Kidsten & co. 1850. Wellcome Collection. Source: Wellcome Collection.