Described in the August 11, 1882 issue of Medical News.  “New spirometer: M.G. Bellange has recently constructed an apparatus for the measurement of the capacity of the chest, the amount of air expired in a given time, and the amount of exhaled gases. It consists of a mouthpiece, a spirometer and a carbonimeter.”  Taken from:  http://www.webimed.net/Spiro_1889.html