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Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
5 results returnedSafe mechanical equipment for use in shaft sinking
Use of bituminous coal in househeating furnaces
Fuels available for domestic use as substitutes for anthracite coal
Automatic derailing switch at Roslyn no. 3 mine, Northwestern Improvement Company, Roslyn, Wash.
Published Year
Subject
- Anthracite coal (1)
- Anthracite coal industry (1)
- Antracite coal mines and mining (1)
- Bituminous coal (1)
- Coal mines and mining--Equipment and supplies (1)
- Coal-fired furnaces (1)
- Heating (1)
- Mine safety--Washington (State) (1)
- Mines and mineral resources--Washington (State) (1)
- Shaft sinking (1)
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