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Map of Historic Dock Creek
Last gasp of the Schuylkill Interceptor, December 20, 1956
The Water Supply Problem of Philadelphia, 1899
Volume of Sludge from 1,000,000 Gallons of Sewage
Diagram Showing Rate Between Bulk of Wet Sludge and Its Percentage Moisture
Sludge Drying Beds, Essen Nord, Germany
Grit Chamber, Essen, Germany
Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder
Sludge Presses for Grease Recovery, Bradford, England
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913
Thomas Run sewer outlet at Cobbs Creek
Water, Water Everywhere – Philadelphia Record, 1937-03-14
A Day in the Ma’sh – Oil Refinery
Frankford Creek: Sad History of an Urban Stream title page
Outhouse over the Schuylkill near Pottstown
36. [Laboratory] Left to right: raw water, settled water, filtered water, ca. 1943
35. [Laboratory] Turbidity test ca. 1943
Laboratory Alkalinity test, ca. 1943
32. [Laboratory] Bacteria count
31. [Laboratory] Taste and odor test
Baldwin Locomotive Works
Pegg’s Run, Northern Liberties (Watson’s Annals)
Swimmers at Pier 126, Delaware River, July 15, 1918
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