2 Hourglasses, supposed to be an 18th century sermon glass
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: 2 Hourglasses, supposed to be an 18th century sermon glass. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: 2 Hourglasses, supposed to be an 18th century sermon glass. Wellcome Collection. Source: Wellcome Collection.