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Fairmount Dam Fish Ladder diagram
Visionary planning report for Philadelphia region, 1928
PWD Drinking Water Treatment diagram
Typhoid bacteria diagram, 1905
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
Army Corps of Engineers 1882 Report on Navigation in Frankford Creek
Philadelphia Ash Service – Plan, Side and End Elevations of Car
Hudson’s Square – A Place Through Time, Archeological Data Recovery on Block 2 of Independence Mall
Diagram showing heights of reservoirs, dams, standpipes &c, 1894
Wastewater Treatment Process diagram