title: An 1869 engraving of the Ether Monument.
mesh_terms: D000776:Anesthesiology / Q000266:history*; D018685:Anesthetics, Inhalation / Q000266:history*; D001900:Boston; D004741:Engraving and Engravings; D004986:Ether / Q000266:history*; D049672:History, 19th Century; D006801:Humans; D008512:Medicine in the Arts
chemical_list: D018685:Anesthetics, Inhalation; D004986:Ether