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Why miners' portable electric lamps require safety devices
The improved permissible flame safety lamps
Investigation of electrical equipment, safety lamps, and gas detectors for safety
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Published Year
1920-1929 (1)
1930-1939 (2)
Subject
Safety lamps (3) *
Electric lamps, Portable (1)
Gas detectors (1)
Mine lighting--Equipment and supplies (1)
Mine safety--Equipment and supplies (1)
Mines and mineral resources--Equipment and supplies (1)
Mines and mineral resources--Research (1)
Author
Ilsley, L. C. (3) *
Coggeshall, E. J. (1)
Hooker, A. B. (1)
