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- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Closeup showing the application of the Woodward vertical model compensating governor.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Is this Mill still standing? What happened to the Woodward governor?
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- A 1944 James Leffel Water Wheel blueprint drawing showing a Woodward size D governor.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- WOODWARD GOVERNOR COMPANY. Success in a Unique Field.
- Woodward... State Of The Art Hydro Controls For 152 Years.
- Woodward... State of the Art Hydro Controls.
- A Woodward Hydro Governor History Project.
- Woodward... State of the Art Hydro Controls.
- The new Woodward Oil Pressure Turbine Water Wheel Governor, circa 1912.
- Elmer Woodward favorite magazine to read.