Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Face mask for Clover's 'Portable Regulating Ether Inhaler',. Science Museum, London. Source: Wellcome Collection.

Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Face mask for Clover's 'Portable Regulating Ether Inhaler',. Science Museum, London. Source: Wellcome Collection.
