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Fairmount Dam Fish Ladder diagram
PWD Drinking Water Treatment diagram
Typhoid fever deaths, 1860-1936
Typhoid bacteria diagram, 1905
Main Pumping Stations for Philadelphia Drinking Water
Volume of Sludge from 1,000,000 Gallons of Sewage
Diagram Showing Rate Between Bulk of Wet Sludge and Its Percentage Moisture
Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913
Bacteria in Delaware River, Torresdale Filters, 1913
Philadelphia Ash Service – Plan, Side and End Elevations of Car
Diagram showing the daily pumpage for the year 1877
Diagram showing heights of reservoirs, dams, standpipes &c, 1894
Wastewater Treatment Process diagram