Dateline: London, April 1868. American dentists' demonstration of "Anaesthesia in dentistry by protoxide of nitrogen".
D000766:Anesthesia, Dental / Q000266:history; D001680:Biographies as Topic; D003813:Dentistry; D006665:History of Dentistry; D009609:Nitrous Oxide / Q000266:history
D009609:Nitrous Oxide