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Creation date / 2019 / Week 26
- Rockford, Illinois history, circa 1900.
- A advertisement from 1901.
- WATER POWER DEVELOPMENT.
- Greenock water wheel governor drawing, circa 1847.
- Greenock water wheel governor drawing, circa 1847.
- NIAGARA FALLS AREA MAP.
- WATER POWER DEVELOPMENT.
- Greenock water wheel governor drawing, circa 1847.
- Greenock water wheel governor drawing, circa 1847.
- Vintage Hydroelectric Power Plant history.
- NIAGARA FALLS AREA MAP.
- Vintage Hydroelectric Power Plant history.
- W. F. & JOHN BARNS COMPANY HISTORY.
- Rockford, Illinois history, circa 1900.
- Figure 173.