Browse TRAIL Inventories

Methods and costs of mining at Hartley-Grantham mine, Tri-State zinc and lead district

Shaft-sinking methods, practices, and costs of the Consolidation Coal Co. at its no. 261 mine, Caretta, McDowell County, W. Va.

Factors governing the selection of the proper level interval in underground mines

Milling methods and costs at the Hillside Fluorspar mines, Rosiclare, Ill.

Mining and technology graduates and their problems

Shaft-sinking methods and costs, and cost of plant and equipment at the Macassa Mine, Kirkland Lake, Ontario

Factors and conditions that aid in alinement of pillar extraction lines in coal mining

Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

Sand and gravel excavation.

The design of small wooden head frames

Strategic minerals investigations :procedure followed by the Bureau of Mines


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