Kimmell's nitrous oxide near the Centennial Exposition.
George S
GS
Bause
D000329:Advertising / Q000266:history*; D000776:Anesthesiology / Q000266:history*; D018685:Anesthetics, Inhalation / Q000266:history*; D049672:History, 19th Century; D009609:Nitrous Oxide / Q000266:history*; D014481:United States
D018685:Anesthetics, Inhalation; D009609:Nitrous Oxide