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Abnormal pressures in explosion-proof compartments of electrical mining machines

Guarding trolley wires in mines

Notes pertaining to safety inspections of permissible electric mine equipment

Flame-arresting limitations of flat joints and plain bearings in explosion-proof mine equipment

Electrical viewpoint in a complete safety survey of a coal mine

Bureau of Mines apparatus for demonstrating electrical ignition of mine gas

Reducing "nipping" hazards when tramming coal-mining machinery

Some signaling systems in metal-mine shafts

Prevention of fires caused by electric arcs and sparks from trolley wires

Guarding trolley wires in mines

A study to determine factors causing pressure piling in testing explosion-proof enclosures

International cooperation in reducing mine hazards

Permissible mine equipment approved during 1957-58


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