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- SPEED REGULATION OF HIGH HEAD WATER WHEELS.
- SPEED REGULATION OF HIGH HEAD WATER WHEELS.
- The American Hurdy-Gurdy Water Wheel.
- The completed Prairie du Sac Wisconsin power house, circa 1925.
- The hydro turbine generators inside the Mill City power house.
- The Irving hydro plant governor now in a museum on the original building site that was taken down.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Kilbourn Dam and Power house in the Wisconsin Dells.
- The Mill City hydro dam.
- The Mill City hydro dam.
- The Mill City hydro dam.