Topical Subjects
- Shuttle cars (Mine haulage)25
- Coal Mines and Mining--Mine Facilities.24
- Tipples--Design and construction.22
- Coal miners--Dwellings.13
- Loaders (Machines)13
- Coal Mines and Mining--Mine Entrances.12
- Coal preparation plants.12
- Mine railroads--Cars.11
- Mine gases--Measurement.9
- Mine roof bolting.9
- Boring.8
- Mine timbering.8
- Mining machinery.8
- Railroad tracks.8
- Coal Mines and Mining--Price Hill Colliery.6
- Coal Mines and Mining--Progressive Miners Of America--Ozanic Collection.5
- Coal Mines and Mining--Trevey Collection.5
- Coal--Geology.5
- Coal-handling machinery.5
- Coal.5