Percussion hammer and pleximeter, A. Wintrich, 1841
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Percussion hammer and pleximeter, A. Wintrich, 1841. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Percussion hammer and pleximeter, A. Wintrich, 1841. Wellcome Collection. Source: Wellcome Collection.