- A Woodward gateshaft governor by Celesta
- ANGELL WATER WHEEL COMPANY
- HYDRO-QUEBEC
- L & S ELECTRIC.
- VOITH HYDRO
- WOODWARD VR gateshaft Governor OFFSET CONTROL STANDARD BEFORE 1920
- Vintage Hydroelectric Power Plant history.
- Vintage Hydroelectric Power Plant history.
- 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 Hydroelectric Power advertisement project.
- Another vintage Woodward Governor Company governor application found in the year 2021.
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