1779 Revolutionary War-era map of Philadelphia and environs
Nine visiting nurses ready for work, ca. 1909
Travel through the Philadelphia of a century ago, with a severely erudite guide
Standard Philadelphia (B) Hydrant
Diagram showing heights of reservoirs, dams, standpipes &c, 1894
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
Schuylkill steamship excursions ad, 1852
New Plan of Philadelphia, John A. Paxton, 1811
PWD’s Lance Butler with an invasive flathead catfish
Jar of raw sewage before treatment, 2000
