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.
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 basal metabolism test with a Krogh spirometer. Subject is breathing through soda-lime and the disappearance of oxygen is monitored on the kymograph drum.
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 was being filled with oxygen prior to a procedure.
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 the square box on the right. The stylus is inscribing the spirometer volume on a smoked kymograph drum onthe left.