Found at The Virtual Laboratory. Attributed to Verdin, Charles. 1882. Catalogue des instruments de précision servant en physiologie et en médecine construits par Charles Verdin. (p. 0043, fig. 60). Titled “Spirometer, registering the movements of the breast, the quantity of expired air and the time during which the phenomena occur.”
Found at Europeana.Eu. From Sverresborg Trøndelag Folkemuseum. At a guess, likely from the 1920’s or earlier.
Found at a website that best translates as Netherland Memories.
“Luchtvaartschool. Op het vliegveld Soesterberg wordt in 1925 een begin gemaakt met de opleiding en het testen van aspirant vliegeniers/piloten. Foto: Een leerling piloot blaast uit door een glazen mondstuk van een spirometer. Op deze manier wordt de longcapaciteit gemeten.”
Translated: “Luchtvaartschool. A start on the Soesterberg Airport in 1925 made the training and testing aspiring aviators / pilots. Photo: A pupil pilot blows out through a glass nozzle of a spirometer , The lung capacity in this way were measured.”
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
A comparison of filled Douglas bags, one from a resting test and one from an exercise test.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
Douglas bag shown filled following an exercise test.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
Demonstrating how to use a Douglas bag to collect exhaled air during exercise.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
Demonstrating how to empty a Douglas Bag.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
A pair of flutter valves inside glass. Intended to be used to measure minute ventilation with a Douglas bag.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
The action of the valve attached to the Douglas bag was being demonstrated.
Found at Europeana.Eu. From an educational film entitled “Methods of measuring metabolism and basal metabolism Krogh and Douglas bag”, Produced by the Department of Physiology, Cambridge University, 1934.
The Krogh spirometer is being calibrated by immersing a glass tube with known volume into a water column.