- Factory photo of a Woodward compenensating type D water wheel governor.
- WOODWARD GOVERNOR COMPANY CATALOGUE FROM THEIR FACTORY AT 658-660 RACE STREET CIRCA 1908 035
- A page from Elmer Woodward's Power Control booklet from 1911
- WOODWARD GOVERNOR COMPANY HORTIZONTAL GOVERNOR MADE AT 658-660 RACE STREET CIRCA 1908 034 001
- Vintage Woodward compensating type governor factory photo.
- Vintage Woodward compensating type D Water Wheel Governor.
- Woodward Governor Company catalog, circa 1908.
- ELMER WOODWARD'S WATER WHEEL CATALOGUE FROM THE 1930'S.