The air-pump of Otto von Guericke.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: The air-pump of Otto von Guericke. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: The air-pump of Otto von Guericke. Wellcome Collection. Source: Wellcome Collection.