Upper Roxborough filter beds under construction, July 1902
Rudolph Hering
Outhouse over the Schuylkill near Pottstown
McConnell Germ-Proof Filters ad
Bureau of Water Spring Garden Testing Station, 1901
Northern Liberties and Spring Garden Water Works
Apparatus for testing model turbine wheels used at Fairmount, 1859-60
Duplex Pumping Engine, Belmont Works
Electric Pump Installations at Lardner’s Point Pumping Station
Fairmount Water Works, about 1860
