Barnes-Skinner Mallet for 110 Volt Current
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Barnes-Skinner Mallet for 110 Volt Current. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Barnes-Skinner Mallet for 110 Volt Current. Wellcome Collection. Source: Wellcome Collection.