- PELTON WATER WHEEL COMPANY HISTORY.
- Vintage Hydroelectric Power Plant history.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- HOLYOKE TURBINE TESTING REPORT, CIRCA 1880.
- WATER-POWER DEVELOPMENT.
- HARPER'S FERRY MANUFACTURING REPORT,CIRCA 1870.
- Water-power Chronicle.
- Company nameplate example.
- A vintage Curtiss propeller engine governor.
- A vintage Curtiss propeller engine governor.
- A vintage Curtiss propeller engine governor.
- A vintage Curtiss propeller engine governor.
- A vintage Curtiss propeller engine governor.
- A vintage Curtiss propeller engine governor.