Philadelphia the Manufacturing and Industrial Capital map, 1906
1779 Revolutionary War-era map of Philadelphia and environs
Centennial Exhibition situation plan, 1876
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
69th St. Sewer and Culvert across Lansdowne AVe.
Outhouse over the Schuylkill near Pottstown
Northern Liberties and Spring Garden Water Works
Electric Pump Installations at Lardner’s Point Pumping Station
View from the Inclined Plane near Philadelphia, 1838
Fairmount Water Works, about 1860
