1900s, Mask, Photograph, Spirometer, Valve Spirometer, Marcet Modification, 1909 February 15, 2014 Richard Johnston Leave a comment From: The Harvey Lectures, Volume 3, 1909, page 226. A standard Hutchinson-style spirometer outfitted with what appear to be Muller (water seal) one-way valves and a mask for measuring tidal or minute volume.