title: A history of nitrous oxide and oxygen anaesthesia. IVa. Further light on Hickman and his times.
mesh_terms: D000769:Anesthesia, Inhalation / Q000266:history*; D004739:England; D049671:History, 18th Century; D049672:History, 19th Century; D009609:Nitrous Oxide / Q000266:history*; D010100:Oxygen / Q000266:history*; D012606:Scotland; D012955:Societies, Medical / Q000266:history; D014495:Universities / Q000266:history
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen