- Woodward... At the Heart of the System Since 1870.
- THR TUTTHILL WATER WHEEL AD
- The White River Hydro History.
- The Pelton Water Wheel Company History, circa 1902.
- THE PELTON WATER WHEEL COMPANY ADVERTISEMENT FROM 1903.
- THE PELTON WATER WHEEL COMPANY AD IN 1903.
- The Journal of Electricity Power and Gas .
- The Journal of Electricity Power and Gas .
- The Hydraulic Equipment of the Colgate Power House History Project.
- The Fairbanks-Morse Company logo.
- The Doulbl Ellipsoidal Water Wheel Buckets.
- THE DESIGN OF TENGENTIAL WATER WHEELS, PAGE 1.
- THE DESIGN OF TENGENTIAL WATER WHEELS PAGE 4.
- THE DESIGN OF TENGENTIAL WATER WHEELS PAGE 3.
- THE DESIGN OF TENGENTIAL WATER WHEELS PAGE 2.