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Permissible explosives, mining equipment, and apparatus approved prior to January 1, 1925

Additions, Removals and Changes in Permissible List of Explosives from January 1, 1925 to July 31, 1926

Published Year

• 1920-1929 (2)

Subject

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

Author

• Perrott, G. St. J. (2) *
• Crawshaw, John Edwards, (1)
• Fieldner, A.C. (1)
• Ilsley, L.C. (1)
• Parker, D.J. (1)

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