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Shows timber roof-support and mine railway track.

2677. Elkhorn No. 3 Seam, Mine 206, Kentucky

2678. Cavalier No. 206 Mine, Elkhorn No. 3 Seam Showing Top and Bottom Bend

Overcast, where two air currents cross in a mine, at the Jamison Mine No. 9 shaft bottom.

2679. Overcast in Jamison No. 9 Mine Shaft Bottom

Controls at the Jamison No. 9 Mine.

2680. Elevator Controls at the Jamison No. 9 Mine

Controls at the Jamison No. 9 Mine.

2681. Elevator Controls at the Jamison No. 9 Mine

Controls at the Jamison No. 9 Mine.

2682. Elevator Controls at the Jamison No. 9 Mine

2683. Coal Shuttle in Jamison Mine No. 9

Mine car traveling through the mine.

2684. Mine Car

2685. Diaphram Pump at Jamison Mine No. 9

'A small portion of the hot ash-laden gas stream entering the turbine is continuously removed by this ash-sampling unit. Data from the operation of this unit is analyzed to determine the concentration, size, and composition of the ash in the hot gases entering the turbine.'

2686. Sampling Hot Ash-Laden Gas

2687. ITE Circuit Breaker at Jamison Mine No. 9

Jamison No. 9 Mine shaft with a tensioning device on a cable.

2688. Rock Dusted Mine Shaft at Jamison No. 9