- A 1905 governor contraption for controlling water wheels .
- Vintage Hydroelectric Power Plant history, circa 1906.
- Vintage Hydroelectric Power Plant history, circa 1910.
- 1910 FLY-BALL GOVERNOR ON GAS BLOWER ENGINE
- 1912
- 1916 2
- 1916 3
- Page 7.
- Page 8.
- 1916
- 1918 letter. Page 2.
- 1918 letter. Page 3.
- 1918 labor
- 1918
- 1919 2