Bridge Street Draw, July 26, 1897
“Philadelphia Underground,” Jan. 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
State Street pipeline construction, 1904
Electric Pump Installations at Lardner’s Point Pumping Station
View from the Inclined Plane near Philadelphia, 1838
Standard Philadelphia (B) Hydrant
Engine House, Belmont Works
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
New Mill House at Fairmount
