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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.

37. 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.

38. Cutting Machine in Operation at Mine No. 32

39. Machinery at a Coal Mine in Thomas, W. Va.

40. Machinery at a Coal Mine in Thomas, W. Va.

41. Machinery at a Coal Mine in Thomas, W. Va.

42. Machinery at an Unidentified Coal Mine

43. Machinery at an Unidentified Coal Mine

44. Machinery at an Unidentified Coal Mine

Miners and filled coal cars inside a mine.

45. Interior of a Coal Mine

Miners talking while others run drilling equipment.

46. Miners and Equipment Inside a Coal Mine

47. Electric Cable Reel and Joy Shuttle Car with Road Drag at Jamison No. 9 Mine

Miners using a machine to bolt the mine roof.

48. Roof Bolting in Pursglove No. 15 Coal Mine