Compass Microscope - 18th century development of the Murschenbroek simple microscope. It has a circular disc carrying lens of various powers.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Compass Microscope - 18th century development of the Murschenbroek simple microscope. It has a circular disc carrying lens of various powers. Wellcome Collection. Source: Wellcome Collection.