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Two men using large bits to drill prior to placing charges.

13. Drilling Prior to Placing Charges

14. Coal Loading Machine

15. Coal on Conveyor

16. Miner Operating a Coal Loading Machine

17. Making a Cut in Coal Face Prior to 'Shooting Down' Coal

Two men working with a rubber tire mounted cutting machine.

18. Miners Operating a Cutting Machine

19. Miner Operates a Coal Cutting Machine Prior to Blasting

20. Miners Operating a Cutting Machine

Two miners cut coal at Pursglove No. 15

21. Miners Operating a Cutting Machine in Pursglove No. 15 Mine

Caption on back reads, 'Making a cut in the coal face is this Mastodon of the machine age - an underground cutter.  Rubber tired for mobility, and mounting a 9-foot cutting blade armed with whirring steel bits, it can cut a full 360 degree arc.  This and similar machines give America's bituminous coal mines almost unlimited capacity for production.'

22. Miners Operating a Cutting Machine at Mine No. 32, Consolidation Coal Company, Owings, W. Va.

Two miners operate a track mounted coal cutting machine.

23. Track Mounted Cutting Machine

A gear driven cutting machine stands on the track.

24. Very Old Track Mounted Cutting Machine