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- "Descriptive Pamphlet of N. F. Burnham's New Turbine Water Wheel for 1871" -
- 1871
- Collections - Artifact
"Descriptive Pamphlet of N. F. Burnham's New Turbine Water Wheel for 1871"
- "Leffel Vertical Shaft Hydraulic Turbines. Bulletin A-45," circa 1930 -
- circa 1930
- Collections - Artifact
"Leffel Vertical Shaft Hydraulic Turbines. Bulletin A-45," circa 1930
- Water Turbine, Used by the Washington Water Power Company, 1903 -
- 1903
- Collections - Artifact
Water Turbine, Used by the Washington Water Power Company, 1903
- Leffel Hydraulic Turbine, circa 1895 -
- circa 1895
- Collections - Artifact
Leffel Hydraulic Turbine, circa 1895