The purchase of coal under government and commercial specifications on the basis of its heating value. With analyses of coal delivered under government contracts.

Sampling coal deliveries and types of Government specifications for purchase of coal.
Published: (1913)

Purchases of coal and wood.
Published: (1895)

Alaska coal contracts.
Published: (1911)

Analyses of Iowa coals.
Published: (1921)

Department of the Interior. United States Geological Survey. George Otis Smith, Director. Bulletin 378. Results of purchasing coal under government specifications.
Published: (1909)

Department of the Interior. United States Geological Survey. George Otis Smith, Director. Bulletin 366. Tests of coal and briquets as fuel for house-heating boilers.
Published: (1908)

Grant extensions of time under coal permits.
Published: (1928)

Granting extensions of time under coal permits.
Published: (1928)

Analyses of coals purchased by Government during fiscal years 1908-1915.
Published: (1916)

Government regulation of the coal industry : (supplementary to handbook "Government ownership of coal mines") /
by: Johnsen, Julia Emily
Published: (1926)

Government coal purchases under specifications, with analyses for fiscal year 1909-10; with chapter on fuel-inspection laboratory of Bureau of Mines.
Published: (1912)

Purchase of certain coal claims in the Philippine Islands.
Published: (1906)

Purchase of certain coal claims in the Philippine Islands.
Published: (1906)

The purchase of coal by the Government under specifications : with analyses of coal delivered for the fiscal year 1908-9 /
by: Pope, George S.
Published: (1910)

Analyses of Kentucky coals.
Published: (1922)

Analyses of Ohio coals.
Published: (1923)

Selected articles on government ownership of coal mines /
by: Johnsen, Julia E.
Published: (1923)

Graphic studies of ultimate analyses of coals.
Published: (1915)

Use of hydrogen-volatile-matter ratio in obtaining net heating value of American coals.
Published: (1918)

Contributions to the study of coal ; Banded ingredients of no. 6 coal and their heating values as related to washability characteristics and preliminary report on unit coal-specific gravity curves of Illinois coals /
by: McCabe, Louis Cordell, 1904-
Published: (1934)

The story of coal.
Published: (1914)

Contracts for coal. Letter from the Secretary of the Navy, transmitting, in answer to a resolution of the House of the 6th instant, a communication from the Chief of the Bureau of Equipment and Recruiting, relative to contracts for the purchase of coal.
Published: (1868)

Analyses of Colorado coals.
Published: (1937)

Model code of safety regulations for underground work in coal mines for the guidance of governments and of the coal-mining industry.
Published: (1950)

Coal-mining.
by: Statham, Ira Cyril Frank, 1886-
Published: (1951)

Mining coal /
by: Davey, John
Published: (1976)

Coal-mining /
by: Statham, Ira Cyril Frank, 1886-
Published: (1956)

Coal mines.
Published: (1910)

Coal and coal mining in West Virginia /
by: Barlow, James A.
Published: (1974)

Results of purchasing coal under government specifications /
by: Burrows, John S. (John Shober), 1911-, et al.
Published: (1909)

Analyses of Pennsylvania bituminous coals.
Published: (1939)

Analyses of New Mexico coals.
Published: (1936)

Ford coal mine /
Published: (1921)

Relief of Unemployment in Coal Mining Areas. Memorandum of Subcommittee Chairman on Information Pertaining to the Announcement and Subsequent Abandonment of a Coal Purchasing Program for the Relief of Unemployment in Distressed Coal Mining Areas under the Direction of the Foreign Operations Administration.
Published: (1956)

Coal geology and coal technology /
Published: (1984)

Practical coal mining.
by: Mason, Ernest
Published: (1954)