Search U.S. government technical reports digitized or harvested by TRAIL.
How leakage of current from an electric shot-firing circuit causes misfires
Laboratory and field tests of a permissible indicating methane detector
The overheating of rubber-sheathed trailing cables
Do fuses protect against methane ignition?
The splicing of rubber-sheathed trailing cables
Rubber-Sheathed Trailing Cables
Evolution of methane detecting devices for coal mines
Dry cells and their application to mining
Factors that decrease the light of electric cap lamps
Special multiple-shot blasting units
Maintaining the permissibility of electric cap lamps
The improved permissible flame safety lamps
Behavior of flame safety lamps in mine atmospheres deficient in oxygen