Oak Lane Reservoir pipeline, 1904
State Street pipeline construction, 1904
Finished Upper Roxborough filters, 1903
Upper Roxborough filter beds under construction, July 1902
Outhouse over the Schuylkill near Pottstown
Duplex Pumping Engine, Belmont Works
Engine House of the Belmont Works
Electric Pump Installations at Lardner’s Point Pumping Station
View from the Inclined Plane near Philadelphia, 1838
Philadelphia Standard Distribution Valve