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1861. Conveyor Belt Mechanism Inside a Coal Mine

1862. Conveyor Belt Mechanism Inside a Coal Mine

1863. Coal on a Conveyor Belt Inside a Mine

1864. Coal Loaded in a Shuttle Car

1865. Men at Work Outside at Truax Traer Coal Company, Elkville, IL

1866. Truax Traer Coal Company Mine, Elkville, IL

1867. Miner at Work Underground in a Coal Mine

1868. Miner at Work Underground in a Low Ceiling Coal Mine

1869. Miners Enter a Low Ceiling Mine on an Electric Cart

1870. Miner on an Electric Cart

1871. Miners Entering the Mine on an Electric Cart

1872. Miner on an Electric Cart