- An application of a Woodward compensating type water wheel governor.
- An application of a Woodward compensating type water wheel governor.
- Greenock water wheel governor drawing, circa 1847.
- Greenock water wheel governor drawing, circa 1847.
- Greenock water wheel governor drawing, circa 1847.
- Greenock water wheel governor drawing, circa 1847.
- Niagara Falls area factory history.
- Niagara Falls area factory history.
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