Consolidation Coal Company Mine No. 11, Lepley Ventilator, East side o...
Significance: The Lepley ventilator is significant as one of the few centrifugal mine ventilation fans in the eastern United States, surviving in situ. The ventilator, patented in 1903 by Daniel Lepley, helped... More
Consolidation Coal Company Mine No. 11, Lepley Ventilator, East side o...
Significance: The Lepley ventilator is significant as one of the few centrifugal mine ventilation fans in the eastern United States, surviving in situ. The ventilator, patented in 1903 by Daniel Lepley, helped... More
Consolidation Coal Company Mine No. 11, Lepley Ventilator, East side o...
Significance: The Lepley ventilator is significant as one of the few centrifugal mine ventilation fans in the eastern United States, surviving in situ. The ventilator, patented in 1903 by Daniel Lepley, helped... More
Consolidation Coal Company Mine No. 11, Lepley Ventilator, East side o...
Significance: The Lepley ventilator is significant as one of the few centrifugal mine ventilation fans in the eastern United States, surviving in situ. The ventilator, patented in 1903 by Daniel Lepley, helped... More