Arch Street Ferry, Philadelphia
PWD water tech at the Philly Home Show, 1960 (detail)
Lab tech, water cleaning demo, Philly Home Show, 1960
‘Gillette, All By Himself, Gets Fine New Idea On Germ Slaying’
State Street pipeline construction, 1904
Immigrant family, ca. 1900, nurse in black
“Philadelphie,” Bird’s Eye View, 1855
Schuylkill steamship excursions ad, 1852
Race Bridge, Fairmount Water Works, 1834
The Shield passing the site of Philadelphia (Watson’s Annals)