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The relative safety of brass, copper, and steel gauzes in miners' flame safety-lamps

Are flame safety lamps suitable for detecting petroleum vapors?

Permissible single-shot blasting units

Published Year

• 1920-1929 (3) *

Subject

• Blasting (1)
• Mine explosions--Prevention (1)
• Safety lamps (1)
• Safety lamps--Materials--Testing (1)

Author

• Hooker, A. B. (3) *
• Ilsley, L. C. (2)
• Yant, W. P. (1)
• Zellers, D. H. (1)

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