Birch’s Views of Philadelphia, 1800
Mill Creek Sewer under construction, 1883
Fairmount Water Works, W.H. Bartlett, 1839
Fairmount Water Works from the forebay, 1833
Fourth of July, Centre Square, ca. 1812
Centre Square Engine House, ca. 1807
Bridge Street Draw. Southwest side of bridge. April 19, 1896. [Detail].
Bridge Street Draw, April 19, 1896. [Detail of men]
Map of Philadelphia showing Population in year 1920
“Philadelphia Underground,” Jan. 29, 1961