From the Journal of the American Medical Association, Volume 176, No. 1, 1928, page 30.
Category Archives: 1920s
Respiration Calorimeter, 1922, Diagram
From Albany Medical Annals, Volume 21, October 1922. “An outline of the principals of calorimetry as applied to the clinic”, By J.H. Means, page 444.
Spirometer, Portable Benedict, 1922, Diagram
Several different versions of Benedict’s portable basal metabolism system were manufactured. From Albany Medical Annals, Volume 21, October 1922. “An outline of the principals of calorimetry as applied to the clinic”, By J.H. Means, page 442.
Portable Metabolic Apparatus, Zuntz, 1928
Found on the VL Technology website. Design attributed to Zuntz. From Zimmermann, E. 1928. Psychologische und Physiologische Apparate: Liste 50. (p. 0249, fig. 3038)
Verdin Spirometer, 1920
Found on Pinterest. Labeled as “Le spiromètre métallique de Verdin, 1920.” Posted by Françoise Soros.
Douglas Bag and Verdin Spirometer, 1920
Found on Pinterest. Labeled as “Analysis of exhaled air during an exercise with Waller’s device, 1920.” Although the spirometer is not labeled, it looks like the Verdin spirometer which was based on a gas meter. Posted by Françoise Soros.
Douglas Bag, 1920, Exercise
Found on Pinterest. Labeled as “Spirometry – Exercise with Waller’s Device, 1920”. Waller’s Device may be the mask and breathing valves since the Douglas bag was already well known by this time. Posted by Françoise Soros.
Collins Tissot Gasometer, circa 1925
From an undated photo. Gasometer style indicates it’s from 1920’s.
Treadmill, Collins, 1920
From Collins Exercise and Stress Testing Equipment catalog, copyright 1980, page 2.
Dethloff’s Spirograph, 1926
From “Methods in pulmonary physiology”, by Bertels H, Bucherl E, Hertz CW, Rodewald G, Schwab M. Translated by Workman JM. Hafner Publishing Co., 1963, page 24.
“In Dethloff’s apparatus, the difference in volume of expiratory gases before and after absorption of CO2 is used to measure CO2 output. To this end two gas meters are placed in the circuit, one proximal and one distal to the CO2 absorber. The difference in reading between the two gas meters provides a continuous measure of CO2 output.”