- Woodward Governor Company's bid for a Hydro-electric power plant governor system, circa 1916.
- Woodward Governor Company's bid for a Hydro-electric power plant governor system, circa 1916. 2
- Page 4.
- Woodward Governor Company's bid for a Hydro-electric power plant governor system, circa 1916. 3
- Page 6.
- Page 5.
- A restored Woodward size D governor manufactured in 1937.
- BARNHART ISLAND HYDRO POWER HISTORY.
- An abandoned Woodward size D compensating type water wheel governor.
- 38
- 4
- 15
- BARNHART ISLAND HYDRO POWER HISTORY.
- 2-1
- 2-2