title: Laughing "Gas" from Knoxville's Dr. H. F. Huffaker.
mesh_terms: D006665:History of Dentistry; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009609:Nitrous Oxide / Q000266:history*; D013714:Tennessee
chemical_list: D009609:Nitrous Oxide