Custer Electric Oven for Full Cases. Fig. 136, page 312,'Dental Electricity' by Levitt E Custer, 1901.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Custer Electric Oven for Full Cases. Fig. 136, page 312,'Dental Electricity' by Levitt E Custer, 1901. Wellcome Collection. Source: Wellcome Collection.