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'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.'

1. Sampling Hot Ash-Laden Gas

IDNO:: 002686
Title:: Sampling Hot Ash-Laden Gas
Date:: ca. 1960-1970
Description:: '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.'

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

IDNO:: 002694
Title:: Summerlee Hoisting Room, C. B. Lee, Engineer, at the Controller
Date:: ca. 1900-1920

View of a row of boilers and equipment in an underground mine.

3. Boilers in a Coal Mine

IDNO:: 002710
Title:: Boilers in a Coal Mine
Description:: View of a row of boilers and equipment in an underground mine.

4. Mining Machinery, Thomas, W. Va.

IDNO:: 002727
Title:: Mining Machinery, Thomas, W. Va.

5. Mining Machinery, Thomas, W. Va.

IDNO:: 002729
Title:: Mining Machinery, Thomas, W. Va.

6. Mining Machinery, Thomas, W. Va.

IDNO:: 002730
Title:: Mining Machinery, Thomas, W. Va.

7. Room with Mining Machinery and Equipment, Thomas, W. Va.

IDNO:: 002732
Title:: Room with Mining Machinery and Equipment, Thomas, W. Va.