S S White Electric Warm Air Syringe. Fig 142, page 327 'Dental Electricity' by Levitt E Custer, 1901.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: S S White Electric Warm Air Syringe. Fig 142, page 327 'Dental Electricity' by Levitt E Custer, 1901. Wellcome Collection. Source: Wellcome Collection.