- 1928 LETTER PAGE 2
- 1931 Woodward Governor Company field service report about the C.W. Peak Grist Mill
- Fitz Water Wheel Company letter, circa 1931.
- THE HOPPES WATER WHEEL COMPANY LETTER, CIRCA 1931.
- WGC SIZE D SN 4341
- TRUMP MFG COMPANY, CIRCA 1921.
- Obsolete governor types, circa 1951.
- An original 1918 tracing paper drawing of a Woodward size D water wheel governor installation.
- A Woodward size D governor application from 1918.
- An original tracing paper drawing from 1918 showing the schematic drawing of a Woodward water wheel governor application.
- The first generation of Woodward cabinet actuator governor control systems.
- Bradford Electric's earliest data on water wheel governors, circa 1841.
- 1841
- IMPROVEMENT IN WATER GOVERNOR CONTRAPTION, CIRCA 1887. AD.
- An early water wheel governor from 1909.