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Ignition of gas by miniature electric lamps with tungsten filaments
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Published Year
1910-1919 (1)
Subject
Electricity in mining--United States (1)
Firedamp--Reactivity (1)
Incandescent lamps--Testing (1)
Mine explosions--United States (1) *
Tungsten lamps--Testing (1)
Author
Clark, H. H. (1) *
