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Bottled vs. Tap in 1906
PWD Drinking Water Treatment diagram
“A Decidedly Mixed Drink,” April 6, 1899
Isometrical View of Fairmount Water Works, 1843
Bacteria in Delaware River, Torresdale Filters, 1913
PWD water tech at the Philly Home Show, 1960 (detail)
Lab tech, water cleaning demo, Philly Home Show, 1960
Upper Roxborough filter beds under construction, July 1902
Bureau of Water Spring Garden Testing Station, 1901
Southeast Sewage Treatment Works diagram, 1955
Plan for the Collection, Treatment and Disposal of Sewage, 1914
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
Water Before and After Roxborough
Upper Roxborough Filter Beds Complete, 1903