An example of the Schimmelbusch mask, an open breathing system for delivering an anesthetic. Invented by Curt Schimmelbusch in 1890 and used until the 1950s. The device consists of a wire frame which is covered with several beds of gauze and applied to the patient's face over the mouth and nose. Then high-volatility anesthetic (usually diethyl ether or halothane, and historically chloroform) is dripped on it, allowing the patient to inhale a mix of the evaporated anesthetic and air.
Condition: Good condition, though slightly misshapen.