Fair Mount Water Works engine house, 1819
1779 Revolutionary War-era map of Philadelphia and environs
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
‘Gillette, All By Himself, Gets Fine New Idea On Germ Slaying’
Outhouse over the Schuylkill near Pottstown
Electric Pump Installations at Lardner’s Point Pumping Station
Fairmount Park, bird’s eye view from Lemon Hill, detail
View from the Inclined Plane near Philadelphia, 1838
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912