- WATER-POWER DEVELOPMENT.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- Vintage Hydroelectric Power Plant history.
- PELTON WATER WHEEL COMPANY HISTORY.
- STATION B IN OREGON.
- STATION B IN OREGON 5
- STATION B IN OREGON 4
- RIVER MILL DAM POWER HOUSE GOVERNOR.
- PORTLAND GENERAL ELECTRIC COMPANY PHOTO.
- PELTON WATER WHEEL COMPANY HISTORY.
- Woodward Hydraulic Water Wheel Governors. 7.
- Woodward Hydraulic Water Wheel Governors. 6.
- Woodward Hydraulic Water Wheel Governors. 5.