![](https://waterhistoryphl.org/wp-content/uploads/PWD-1799-Latrobe-cover.jpg?w=300)
![](https://waterhistoryphl.org/wp-content/uploads/PWD-1799-Latrobe-cover.jpg?w=300)
![](https://waterhistoryphl.org/wp-content/uploads/graff-scrapbook2-125-crop.jpg?w=300)
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
![Centre Square Engine House, location of one of two steam engines used in the city’s original water system. Engraving by Birch.](https://waterhistoryphl.org/wp-content/uploads/centre-square-engine-house.jpg?w=300)
Includes steam engines, water-powered wheels or turbines, and gas-fired and electric pumps, used to provide power that operates pumps.