Outhouse over the Schuylkill near Pottstown
Electric Pump Installations at Lardner’s Point Pumping Station
View from the Inclined Plane near Philadelphia, 1838
Commencement of laying the main on the East side of the River, 1871
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
New Mill House at Fairmount
Leslie’s Illustrated Newspaper, Schuylkill Flood 1869
Pennypack Sewage Treatment Works, 1914
Bingham Street Sewer, East of Tacony Creek, 1921
