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Permissible explosives :tested prior to January 1, 1917

Permissible explosives, mining equipment, and apparatus, approved prior to March 15, 1922

Hazards in the use of delay-action detonators in coal mines

Published Year

• 1910-1919 (1)
• 1920-1929 (2)

Subject

• Coal mines and mining--Safety measures (3) *
• Explosives (2)
• Mine explosions (1)

Author

• Howell, S. P. (3) *
• Fieldner, A. C. (1)
• Harrington, D. (1)
• Ilsley, L. C. (1)
• Parker, D. J. (1)

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