Some highlights in the history of nitrous oxide.
D000766:Anesthesia, Dental / Q000266:history; D000769:Anesthesia, Inhalation / Q000266:history* / Q000295:instrumentation; D004340:Drug Contamination; D004739:England; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D009520:New Zealand; D009609:Nitrous Oxide / Q000138:chemical synthesis / Q000266:history*; D010100:Oxygen; D014481:United States
D009609:Nitrous Oxide; D010100:Oxygen