- WATER POWER PLANT HISTORY.
- WATER POWER PLANT HISTORY.
- WATER POWER PLANT HISTORY.
- WATER POWER PLANT HISTORY BOOK.
- The first type of a Woodward Water Wheel Governor.
- Rockford, Illinois view.
- Rockford, Illinois history.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.
- Rockford, Illinois history picture.