title: The early history of anaesthesia in Canada: the introduction of ether to upper Canada, 1847.
mesh_terms: D000758:Anesthesia / Q000266:history*; D002170:Canada; D004739:England; D004986:Ether / Q000266:history*; D005019:Ethyl Ethers / Q000266:history*; D049672:History, 19th Century; D006801:Humans; D014481:United States
chemical_list: D005019:Ethyl Ethers; D004986:Ether