Wood truss drawbridge, Orthodox Street over Frankford Creek, 1899 [Detail]
Pennsylvania Hospital in Pine Street
Centennial Exhibition situation plan, 1876
New Mill House at Fairmount
Race Bridge, Fairmount Water Works, 1834
View of Fairmount Water Works, ca. 1827
Devereaux Street Sewer, Philadelphia magazine, 1911
Flashback Friday … the 13th!