Haldane’s equalizing arrangement 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 38.
Category Archives: Nose Clip
Nose Clip, Hopwood’s, 1920
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.
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.