Fairmount Water Turbine Wheels (1851)
Fairmount Water Powered Water Works (1822)
Fairmount Steam Works (1815)
Twenty-fourth Ward (or West Philadelphia) Works, 1855
The Centre Square Works, 1801
Native American Heritage Day
State of the Schuylkill River in 1876: Sewage pollution and possible remedies
Pennsylvania Railroad Bridge at Manayunk, about 1895
Two reports on the state of the Schuylkill River, 1867
Streams, islands, and ferries of early Philadelphia
