- Amos Woodward's new friction water wheel governor in a hydro turbine company's product catalog.
- Amos Woodward's first patented governor (number 103,813) from 1870
- Amos Woodward's bicycle repairing advertisement, circa 1881
- Amos Woodward Company's size 3 water wheel governor.
- American Hydro Power in the 20th Century.
- ALLIS-CHALMERS TURBINE WATER WHEEL.
- Allis-Chalmers turbine and governor
- Allis-Chalmers Manufacturing Company turbine with a Woodward governor application.
- Allis-Chalmers Manufacturing Company
- Allis-Chalmers Hydro ad
- Allis-Chalmers Hydro ad
- Allis-Chalmers Hydro
- ALLIS-CHALMERS HYDRAULIC TURBINE MANUFACTURING HISTORY.
- Allis-Chalmers governor and turbine
- ALLIS-CHALMERS GENERATOR IN THE SUGAR CANE MILL 3