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Mine car traveling through the mine.

2677. Mine Car

2678. 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.'

2679. Sampling Hot Ash-Laden Gas

2680. ITE Circuit Breaker at Jamison Mine No. 9

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

2681. Rock Dusted Mine Shaft at Jamison No. 9

2682. Inter-Floor Lift at Jamison Mine No. 9

Coal crushed to 3/16-inch by 0 is pumped to a pulverizer that grinds it to 90-per cent hrough 200-mesh. The product is mixed with air and burned in the combustors. Hot high-speed gas from the ash separators drives the turbine, air compressor, and electric generators. Exhaust from the turbine passes through a regenerator that preheats compressed air to the combustors. If used, please credit Bureau of Mines, U.S. Department of the Interior.

2683. Schematic Diagram of Coal-Fired Gas Turbine

Miner washing himself in a small washtub.

2684. Miner Bathing in a Small Tub

This mock-up shows the new blade design being tested by the Bureau of Mines. The base of the blade is thicker and there is a strip of titanium carbide at the point of previous severe erosion. If used, please credit Bureau of Mines, U.S. Department of the Interior.During LDC's final 1,100-hour run, this rotor blade (arrow) was undercut by ash flowing  along the rotor past the tips of the stator blades. If used, please credit Bureau of Mines, U.S. Department of the Interior.

2685. New Rotor Blade Design

This mock-up shows the new blade design being tested by the Bureau of Mines. The base of the blade is thicker and there is a strip of titanium carbide at the point of previous severe erosion. If used, please credit Bureau of Mines, U.S. Department of the Interior.During LDC's final 1,100-hour run, this rotor blade (arrow) was undercut by ash flowing  along the rotor past the tips of the stator blades. If used, please credit Bureau of Mines, U.S. Department of the Interior.

2686. New Rotor Blade Design

2687. Summerlee Hoisting Room, C. B. Lee, Engineer, at the Controller

2688. Cutting Coal by Machine