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Topical Subjects
- Coal--Transportation.1
- Coal-mining machinery.22
- Coke-ovens.1
- Conveying machinery.1
- Electric locomotives.1
- Electricity in mining.1
- Freight cars.1
- Horses.1
- Loaders (Machines)9
- Mine gases--Measurement.6
- Mine gases--Testing.1
- Mine railroads.4
- Mine roof bolting.5
- Mounds.1
- Safety lamps.1
- Shuttle cars (Mine haulage)8
- Slate--Geology.1
- Working dogs.1