The Water Supply Problem of Philadelphia, 1899
State of the Schuylkill River in 1876: Sewage pollution and possible remedies
Two reports on the state of the Schuylkill River, 1867
Streams, islands, and ferries of early Philadelphia
Schuylkill Navigation Company Scrapbook
Half a Century of Clean Water: The Clean Water Act, 1972-2022
19th century life in South Philadelphia’s marshland
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
View from the Inclined Plane near Philadelphia, 1838
Fairmount Water Works, about 1860