Dental artifacts. Jumpin' jack flash! It's a gas, gas gas!
Freeman
Kim
K
D000766:Anesthesia, Dental / Q000266:history*; D003748:Dental Equipment / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D009609:Nitrous Oxide / Q000266:history*; D014481:United States
D009609:Nitrous Oxide