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Map of Philadelphia Harbor, Delaware and Schuylkill, 1912
Scenes on 44th Street Photo Album, 1914-1916
Emscher Tank Installation at Essen Nord, Germany
Coming from West Philadelphia Station, April 18, 1914
Two young women at 44th and Spruce, April 18, 1914
Minetta, her sister, and an older woman, S. 44th St, April 30, 1916
Girl and “Sample House” sign, 313 S. 44th St., April 30, 1916
Minetta Baker, southwest corner of 44th and Spruce, October 1917
Main Pumping Stations for Philadelphia Drinking Water
Young woman in white coat, 320 S. 44th Street, April 1914
Two young men, April 19, 1914
View from porch of 322 S. 44th, April 18, 1914.
E. 44th St. with view of “rear” house, April 19, 1914
View of “near” house, April 17, 1914
View from front of 322 S. 44th, April 18, 1914
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
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