Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Masticator [Whites patent] by John Weiss & Son. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Masticator [Whites patent] by John Weiss & Son. Wellcome Collection. Source: Wellcome Collection.