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Ingersoll drill Co's compressor…
C.V.V. Powers, c. 1883 - in or before 1887, photomechanical print, RP-F-2001-7-1078-5
Headhouse shaft No. 25
C.V.V. Powers, c. 1883 - in or before 1887, photomechanical print, RP-F-2001-7-1078-4
Shaft no 25, and blowoff drift
C.V.V. Powers, c. 1883 - in or before 1887, photomechanical print, RP-F-2001-7-1078-3