Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Subject = Nonmetallic Mineral Resources
  • Location Covered = Northampton
  • Date = 1923-07-18

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.

Displaying 11 items
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Channeling machine, slate quarry
Hoisting slate
Masts and carriage, slate quarry
Masts and hoist house, slate quarry
Polishing blackboard slate
Quarrymen loosening slate
Roofing slate stock pile
Sculp and cleavage in slate quarry
Slate quarry, channel cut and blasted wall
Slate quarry, showing depth
Slate waste