Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Nelson-type inhaler, London, England, 1870-1901. Science Museum, London. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Nelson-type inhaler, London, England, 1870-1901. Science Museum, London. Source: Wellcome Collection.