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Use of geophone in locating compressed-air leaks
Why miners' portable electric lamps require safety devices
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Published Year
1920-1929 (2) *
Subject
Mines and mineral resources--Equipment and supplies (2) *
Compressed air (1)
Compressed air--Safety measures (1)
Electric lamps, Portable (1)
Geophone (1)
Mine ventilation (1)
Mines and mineral resources--Equipment and supplies--Maintenance and repair (1)
Mines and mineral resources--Research (1)
Safety lamps (1)
Author
Ilsley, L. C. (1)
Pickard, Byron O., (1)
