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Close-up view of roof drill in action. Man in background is tightening bolt with air powered wrench at Consol. No. 204, Jenkins, Ky.

19. Miners Roof Bolting at Consol No. 204, Jenkins, Ky.

A coal cutter with nine foot cutting blade at work in Consol. Coal Co. Mine No. 32, Owings, W. Va.

20. Cutting Machine in Operation at Mine No. 32