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Wooden Water Pipe, removed from Market Street, December 6, 1901
Volume of Sludge from 1,000,000 Gallons of Sewage
Diagram Showing Rate Between Bulk of Wet Sludge and Its Percentage Moisture
Finished Upper Roxborough filters, 1903
Pipe Test, 1914
Swimmers at Pier 126, Delaware River, July 15, 1918
Allegheny Avenue Sewer at Pier 126, 1918