![](https://waterhistoryphl.org/wp-content/uploads/2004.019.0010B_crop.jpg?w=300)
![](https://waterhistoryphl.org/wp-content/uploads/2004.019.0010B_crop.jpg?w=300)
![](https://waterhistoryphl.org/wp-content/uploads/PWD-1799-Latrobe-cover.jpg?w=300)
Annual reports and other documents relating to Philadelphia’s water supply system, 1796-1992
![](https://waterhistoryphl.org/wp-content/uploads/graff-scrapbook1-2004071-2004.071.0001.015-crop.jpg?w=300)
Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
![](https://waterhistoryphl.org/wp-content/uploads/graff-scrapbook2-125-crop.jpg?w=300)
Includes steam engines, water-powered wheels or turbines, and gas-fired and electric pumps, used to provide power that operates pumps.