1. The function of the eustachian tube, in its relation to the renewal and density of the air in the tympanic cavity, and to the concavity of the membrana tympani Author(s): Rumbold, Thos. F. (Thomas Frazier), 1830-1901, author Publication: St. Louis : Southwestern Book and Publishing Co., 1873 Subject(s): Eustachian Tube -- physiologyEar, Middle -- physiologyTympanic Membrane -- physiology