- Woodward Power Control subscription for free, circa 1911.
- Adding to the vintage Woodward governor advertisement collection along the way, circa 1911.
- Elmer Woodward's new hydraulic governor developed and patented in 1912.
- Closeup of the bottom part of a Woodward Hydralic gateshaft type water wheel governor. Shop Order H1016. circa 1916.
- Notes on the back of the picture from WGC shop order H1016 field service report.
- Elmer Woodward's patent for the first hydraulic Woodward Water Wheel governor.
- Elmer Woodward's patented hydraulic gate shaft type turbine water wheel governor from 1921.
- Wisconsin Hydroelectric Power History.
- Wisconsin Hydroelectric Power History.
- Wisconsin Hydroelectric Power History.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant showing the original James Leffel turbine water wheel.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant History.