The rib of Adam.
D000766:Anesthesia, Dental / Q000266:history; D000769:Anesthesia, Inhalation / Q000266:history*; D003815:Dentists; D004986:Ether; D049672:History, 19th Century; D006801:Humans; D009609:Nitrous Oxide
D004986:Ether; D009609:Nitrous Oxide