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Evolution of methane detecting devices for coal mines

Lighting practices in coal mines of the United States

Permissible mine equipment approved during 1944

Permissible mine equipment approved to January 1, 1947 :with appended list of available flame-lamp fuels

Permissible mine equipment approved during the calendar year 1947 :supplement to Information Circular 7432

Published Year

• 1930-1939 (2)
• 1940-1949 (3)

Subject

• Coal mines and mining--Safety measures (5) *
• Mine safety (3)
• Mining machinery (3)
• Methane (1)
• Mine lighting (1)
• Mine lighting--Equipment and supplies (1)

Author

• Hooker, A. B. (5) *
• Ilsley, L. C. (1)
• Owings, C. W. (1)

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