PWD water tech at the Philly Home Show, 1960 (detail)
Lab tech, water cleaning demo, Philly Home Show, 1960
Portrait of Samuel H. Ashbridge, Mayor
Philadelphia Water Department chief engineer John Trautwine Jr., 1890s
Nine visiting nurses ready for work, ca. 1909
Fairmount Park, bird’s eye view from Lemon Hill, detail
Race Bridge, Fairmount Water Works, 1834
The Shield passing the site of Philadelphia (Watson’s Annals)
Penn’s Treaty with the Indians (Watson’s Annals)
Pegg’s Run, Northern Liberties (Watson’s Annals)