Centennial Exhibition situation plan, 1876
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
‘Gillette, All By Himself, Gets Fine New Idea On Germ Slaying’
Outhouse over the Schuylkill near Pottstown
Northern Liberties and Spring Garden Water Works
Electric Pump Installations at Lardner’s Point Pumping Station
Fairmount Park, bird’s eye view from Lemon Hill, detail
“Philadelphie,” Bird’s Eye View, 1855
View from the Inclined Plane near Philadelphia, 1838
Fairmount Water Works, about 1860
