- The Pelton Water Wheel Company history, circa 1919.
- THE LOMBARD GOVERNOR COMPANY, CIRCA 1919.
- General Electric Company ad from 1919.
- A run of the river small hydro-electric power plant from 1915.
- A vintage Lombard water wheel governor in a very old hydro plant.
- Mechanicville Hydroelectric Plant
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Just think of how many hours it took to draw this blueprint drawing back in 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 James Leffel Water Wheel blueprint number 43640, circa 1944.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Closeup showing the application of the Woodward vertical model compensating governor.
- A 1944 James Leffel Water Wheel blueprint drawing showing a Woodward size D governor.