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Miner running a continuous mining machine.

1. Continuous Mining Machine

Miners drill two or more holes into coal to place the explosive charges.

2. Drilling Prior to Setting Explosives

Two dogs harnessed to coal carts. About 1890, Ohio Coal Mine. This photograph is the property of Pittsburgh Consolidation Coal Co.

3. Dogs in Harness, Ohio Coal Mine

Miners at work. 'Mountaineer Coal Co., Division of Consolidation Coal Co.'

4. Miners Working with Loading Machine

5. Miner Testing for Gas in Jamison No. 9 Mine

Miner works with cutting machine at Jamison No. 9 mine.

6. Cutting Machine at Jamison No. 9