Ether used to produce insensibility in 1821.
D000758:Anesthesia; D000776:Anesthesiology; D004986:Ether; D004987:Ethers; D049672:History, 19th Century; D006801:Humans
D004987:Ethers; D004986:Ether
ANESTHESIA; ETHER, ETHYL; HISTORY OF MEDICINE, XIX CENT.