Search U.S. government technical reports digitized or harvested by TRAIL.
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
Development and safety of the storage-battery locomotive
Electrical motored equipment :approvals and extensions
Electrical accident prevention
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