Hopwood’s nose clip used in testing mine safety equipment. 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 34.
Category Archives: 1920s
Nose Clip, German, 1920
A German nose clip used in testing mine safety equipment. 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 34.
Nose Clip, Swansea, 1920
A nose clip used in testing mine safety equipment. 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 34.
Valve, Mueller, 1920
A Mueller breathing valve. 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 32.
Valve, Rosling, 1920
A Rosling breathing valve. 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 31.
Valve, Split-Tube, 1920
A split-tube breathing valve. 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 31.
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.
Pocket Spirometer Advertisement, 1922
Found in Public Ownership of Public Utilities, Volume 7, page 243.