TRAIL - Technical Report Archive and Image Library

Active list of permissible explosives and blasting devices approved before December 31, 1951

Petroleum refineries, including cracking plants, in the United States, January 1, 1952

Filling with unclassified tailing in modified cut-and-fill stopes, Dayrock Mine, Wallace, Idaho

Recommendations for improved shuttle-car-haulage safety

Economies through roof bolting in an Indiana coal mine

Underground storage of natural gas in coal-mining areas

Production of manganese slags for manufacturing high-grade ferromanganese by blowing oxidation spiegeleisen

State compensatory provisions for occupational diseases

Industrial minerals of the Pacific northwest

Modified longwall mining with a German coal planer (plow) in the Pocohontas No. 4 coal bed, Helen, W. Va.

Development of new, experimental coke oven

A selected bibliography of coal gasification

Concentration tests on various base-metal ores

Investigation of the Colorado Copper Co. properties, Mesa, and Montrose Counties, Colo.

Treatment tests of scheelite ores and tailings

Development of a rotary test drill

Recovery of lithium from spodumene-amblygonite mixtures

Bumpus pegmatite deposit, Oxford County, Maine

Electrolytic manganese tests in cooperation with industry

Separation and utilization studies of bitumens from bituminous sandstones of the Vernal and Sunnyside, Utah, deposits. !n Part I,

Centrifugal testing apparatus for mine-structure stress analysis

Experimental treatment of barite ores from Montgomery County, Ark. and Morgan County, Mo.

North Dakota sodium sulfate deposits

Investigation of gas explosions in Brighton, N.Y., September 21, 1951

Pilot-plant batch retorting of Colorado oil shale

Refractory properties of Pacific Northwest chromites

Flammability of amyl nitrite

Separation of lead, cadmium, and germanium sulfides from zinc sulfide concentrates

Anthracite mechanical-mining investigations:progress report 7: longhole retreat mining of a steeply pitching anthracite bed

Experiments on multiple short-delay blasting of coal (in two parts) :part II

Experiments on multiple short-delay blasting of coal (in two parts) :part I

Removal of magnesium and magnesium chloride from titanium sponge by vacuum distillation

Investigation of Shamrock coppper-nickel mine, Jackson County, Oreg.

Preparation characteristics of coal from Clearfield County Pa.

Concentration of oxide manganese ores from the vicinity of Cleveland, Bannock County, Idaho

Concentration of oxide manganese ores from Black Rock, Kramer, and Morgan-Cromar properties, Tooele and Juab Counties, Utah

Concentration of oxide manganese ores from San Bernardino County, Calif.

Manganese concentrates from open hearth slags by lime-clinkering (Sylvester) process

Concentration of oxide manganese ores from vicinity of Winkelman, Pinal county, Ariz.

Concentration of oxide and silicate manganese ores from Siskiyou and Mendocino Counties, Northern California

Copper Giant deposits, Pima County, Ariz.

Knox and Yingling fluorite mines, Hardin County, Ill.

Investigation of encampment vermiculite deposits, Carbon County, Wyo.

Electrical conductivity and density of fused binary mixtures of magnesium chloride and other chlorides

Diamond drilling at Torpedo copper mine, Organ mining district, Dona Ana county, N. Mexico

Recovery of thallium from smelter products

Treatment of titaniferous magnetite ore from Iron Mountain, Wyo.

A study to determine factors causing pressure piling in testing explosion-proof enclosures

Malleable chromium and it alloys

MacArthur copper deposit, Lyon County, Nev.

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