Search U.S. government technical reports digitized or harvested by TRAIL.
Miners' safety and health almanac for 1919-
Sulphur dioxide method for determining copper minerals in partly oxidized ores
Rock Quarrying for Cement Manufacture
War Minerals Nitrogen Fixation and Sodium Cyanide
Melting Brass in a Rocking Electric Furnace
Dangerous and safe practices in bituminous coal mines
Labor saving at limestone quarries