Search U.S. government technical reports digitized or harvested by TRAIL.
The action of acid mine water on the insulation of electric conductors.A preliminary report
Electrical accidents in mines :their causes and prevention
State mining laws on the use of electricity in and about coal mines
The relative safety of brass, copper, and steel gauzes in miners' flame safety-lamps
Operation and maintenance of electrical equipment approved for permissibility by the Bureau of Mines
Why miners' portable electric lamps require safety devices
Permissible explosives, mining equipment, and apparatus, approved prior to March 15, 1922
Electric Shot-Firing in Mines, Quarries, and Tunnels
Wanted :more detailed reports on electrical accidents
Safeguarding electrical equipment used in gassy mines :European practice
Development and safety of the storage-battery locomotive
Permissible single-shot blasting units
Electrical motored equipment :approvals and extensions
Electrical accident prevention
Safeguarding electrical equipment used in gassy mines :European practice.
Hazards from low or under voltage
State regulations governing the use of trolley wires in mines
Performance tests for trailing cables
List of permissible mine equipment
How leakage of current from an electric shot-firing circuit causes misfires
Teaching safety through the approval plate
Points to be considered in the design of covers for explosion-proof compartments
Suggested safety rules for installing and using electrical equipment in coal mines
The grounding of electric systems in and around mines
Specially recommended trailing cable
The overheating of rubber-sheathed trailing cables
List of permissible mine equipment
Suggestions for wiring permissible equipment
Specially recommended trailing cables
List of permissible mine equipment
Requirements for bolts and similar fastenings for permissible electrical equipment
The splicing of rubber-sheathed trailing cables
Data in reference to installation of cables in shafts and boreholes
List of motors available to prospective builders of permissible outfits
250 versus 500 volts or more for circuits in gassy coal mines
Rubber-Sheathed Trailing Cables
Evolution of methane detecting devices for coal mines
An international viewpoint on safeguarding electrical equipment used in gassy mines
List of permissible mine equipment
List of permissible mine equipment
Milestones in mine-safety legislation
Permissible electrically operated air compressors
The improved permissible flame safety lamps
List of permissible mine equipment :approved to January 1, 1937