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Topical Subjects
- Coal mines and mining--Dust control--Water infusion.1
- Coal mines and mining--Dust control.1
- Coal mines and mining--Pennsylvania--Finleyville.1
- Coal mines and mining--West Virginia--Owings.1
- Coal mines and mining--West Virginia--Pursglove.1
- Coal mines and mining--West Virginia--Shinnston.1
- Coal--Transportation.1
- Coke-ovens.1
- Conveying machinery.1
- Electric locomotives.1
- Electricity in mining.1
- Freight cars.1
- Horses.1
- Mine gases--Testing.1
- Mounds.1
- Safety lamps.1
- Slate--Geology.1
- Working dogs.1