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.
From: Basal Metabolism: Its determination and Application. FB Sanborn. Page 123. Published 1922. Variation of a Krogh Spirometer. Described in text as being 17 inches high and weighing 40 pounds.