Birch’s Views of Philadelphia, 1800
Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
Centre Square Water System
Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Fairmount Water Works from the forebay, 1833
Centre Square Engine House, ca. 1807
The Water Works in Centre Square, Philadelphia