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.
Tag Archives: Douglas
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.
Douglas Bag, Basal Metabolism, Sheep, 1964
From “The Energy Exchange of Ruminants” a PhD thesis paper by John Patrick Joyce for the University of Glasgow, 1964, page 28.
“Photograph of outdoor experimental site demonstrating the collection of sheep by when wearing a face mask.”
“A large pit 9 ft x 4 ft x 1 ft 6 inches was dug just in front of the skeleton framework and was lined with wood. This pit acted as a guard for two large Douglas bags when they were being filled by the animal and prevented them from blowing away. Placing the Douglas bags below ground level also ensured they did not act as a wind shelter for sheep, especially when the bags were filled with exhaled air.”
Douglas Bag, Basal Metabolism, 2001
From Kinanthropometry and Exercise Physiology Laboratory Manual: Volume 2: Exercise Physiology: Tests, Procedures and Data, by Roger Eston, Psychology Press, 2001, page 141.
Douglas Bag, Oxygen Consumption, 2007
Douglas Bag, 1942, Altitude Research
Douglas bag used to measure oxygen consumption in altitude research. From Popular Science Magazine, May 1942. “How flyers are redesigned. Air Surgeons groom men for survival at high altitude”, page 117.
Douglas Bag, 1942, Altitude Research
Douglas bag used to measure oxygen consumption in altitude research. From Popular Science Magazine, May 1942. “How flyers are redesigned. Air Surgeons groom men for survival at high altitude”, page 116.
Douglas Bag, 1942, Altitude Research
Douglas bag used to measure oxygen consumption in altitude research. From Popular Science Magazine, May 1942. “How flyers are redesigned. Air Surgeons groom men for survival at high altitude”, page 116.
Douglas Bag, 1920, used to test valves
A Douglas bag system to test the efficiency of breathing valves. From The Department of Scientific and Industrial Research, Advisory Council, Second Report of the Mine Rescue Apparatus Committee, Published by His Majesty’s Stationary Office, 1920, page 30.