title: A history of nitrous oxide and oxygen anaesthesia. XI. The use of Hewitt's "mixture" and the development of nasal administration.
mesh_terms: D000766:Anesthesia, Dental / Q000266:history; D000769:Anesthesia, Inhalation / Q000266:history* / Q000295:instrumentation; D049672:History, 19th Century; D049673:History, 20th Century; D009609:Nitrous Oxide / Q000008:administration & dosage*; D009666:Nose; D010100:Oxygen / Q000008:administration & dosage*
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen