Tissot spirometer used for BMR measurements. From Can Med Assoc J. 1918 June; 8(6): 491–509. The determination of basal metabolism by the “Respiratory-valve and spirometer method” of indirect calorimetry, with an observation on a case of polycythemia with splenomegaly.Maude E. Abbott
Horizontal spirometer. From R. Burton-Oppitz. A new type of recording spirometer. Journal of Laboratory and Clinical Medicine. August 1922, Volume 7, no 11, page 2.
Horizontal spirometer. From R. Burton-Oppitz. A new type of recording spirometer. Journal of Laboratory and Clinical Medicine. August 1922, Volume 7, no 11, page 2.
A square version of the Hutchinson Spirometer. From A. Rattray. Description of a new spirometer. Pacific Medical Journal. 1880. Volume 23, No. 1, page 17.
From: Maurice McGregor and Margaret R. Becklake. THE RELATIONSHIP OF OXYGEN COST OF BREATHING TO RESPIRATORY MECHANICAL WORK AND RESPIRATORY FORCE. Volume 40, Issue 6 (June 1961), J Clin Invest. 1961;40(6):971–980.