Browse TRAIL Inventories

Preliminary investigations of storage battery locomotives :specifications laboratory tests permissible schedule

State mining laws on the use of electricity in and about coal mines

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

Bureau of mines safety labels

Development and safety of the storage-battery locomotive

Electrical motored equipment :approvals and extensions

Electrical accident prevention

Permissible junction boxes

State regulations governing explosion-proof type electric motors in coal mines

Electrical safety inspection :suggestions for mine-safety engineers

State regulations governing the use of trolley wires in mines


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