Ether anesthesia; a true gas technique.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D004986:Ether; D004987:Ethers; D006801:Humans
D004987:Ethers; D004986:Ether
ANESTHESIA, INHALATION/apparatus and instruments; ETHER, ETHYL/anesthesia and analgesia