The Schuylkill and Wissahickon banks in 1858
Petition of manufacturers along the Schuylkill River in Philadelphia for a new upstream water supply, 1868
Lighthouses along the Delaware, 1913
Visions of the Schuylkill, 1884 and Now
Centre Square Water System
Centre Square Water Works, Drawings of Intake Basin
Manayunk and the Schuylkill Navigation
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
The Water Supply Problem of Philadelphia, 1899
