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Creation date / 2019 / April
- A Hydro Power Industry history project.
- A vintage Woodward PSG type governor.
- THE AMERICAN MIXED-FLOW TURBINE WATER WHEEL HISTORY.
- American Society of Civil Engineers. Transactions paper No. 1503.
- Brad's vintage machine shop manufacturing history project.
- THE PHOENIX MANUFACTURING COMPANY CATALOGUE.
- Patent number 1,476,914. 2 Sheets-Sheet 1.
- Patent number 1,476,914. Sheet 2.
- Patent number1,476,914. Page 1.
- Patent number 1,476,914. Page 2.
- Patent number 1,476,914. Page 3.
- Patent number 341,577. 1
- Patent number 341,577. 2
- Patent number 341,577. 3.
- Turbine water wheel patent number 341,577. Sheet 1 of 3.