The Weller-Ash nitrous oxide apparatus.
Westhorpe
R
R
D000766:Anesthesia, Dental / Q000266:history* / Q000295:instrumentation; D000769:Anesthesia, Inhalation / Q000266:history* / Q000295:instrumentation; D004739:England; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009609:Nitrous Oxide
D009609:Nitrous Oxide