Isometrical View of Fairmount Water Works, 1843
Fair Mount Water Works engine house, 1819
Wooden Water Pipe, removed from Market Street, December 6, 1901
Bacteria in Delaware River, Torresdale Filters, 1913
Water, Water Everywhere – Philadelphia Record, 1937-03-14
Perkiomen Water Supply Surveys, 1866
Frankford Creek: Sad History of an Urban Stream title page
The Water Works in Centre Square, Philadelphia
Centennial Exhibition situation plan, 1876
PWD water tech at the Philly Home Show, 1960 (detail)