- Woodward Prime Mover Control remembered, circa March 1995.
- THE NEW GOVERNORS OF NIAGARA FALLS.
- Faesch & Piccard mechanical governor system.
- THE NEW GOVERNORS OF NIAGARA FALLS. PAGE 2.
- History of the shaft governor. Page 2.
- History of the shaft governor.
- History of the shaft governor. Page 3.
- Scientific American, circa July 2, 1859.
- Scientific American, circa March 1861.
- Scientific American, circa July 23, 1859.
- Scientific American Journal.
- Scientific American, circa July 2, 1859.
- Scientific American, circa April 6 1861.
- Scientific American, circa 1859.
- The Sibey Journal of Engineering.