Search U.S. government technical reports digitized or harvested by TRAIL.
Salts in the tri-state mill waters :their ill-effect on the flotation of blende and their removal
Low-temperature distillation tests of subbituminous coal from the Denver region coal field, Colorado
Carbonizing properties of western region interior province coals and certain blends of these coals
Carbonizing properties of Powellton-bed coal from Coal Mountain mine, Guyan, Wyoming County, W. Va.
Carbonizing properties of Eagle-bed coal from Prospect shaft, Carbon, Kanawha County, W. Va.
Carbonizing properties of western coals
Carbonizing properties of Elkhorn no. 3-bed coal from Wheelwright mine, Floyd County, Ky.
An investigation of a laboratory test for determination of the free-swelling index of coal
Carbonizing properities of Lower Banner coal from no. 56 mine, Dante, Russell County, Va.
Annual report of research and technologic work on coal and related investigations :fiscal year 1952
Determination of moisture-holding capacity (bed moisture) of coal for classification by rank
The international systems of hard-coal classification and their application to American coals
Evaluation of an acid-extraction method for determining mineral matter in American coals
International system for classifying brown coals and lignites and its application to American coals
Application of rapid methods for analyzing coal ash and related materials
Effect of sulfur retention on determined ash in lower-rank coals