![Black-and-white photo of industrial tank installation with smokestacks and factories in the background](https://waterhistoryphl.org/wp-content/uploads/emscher-tank-essen-nord-germany.jpg?w=300)
![Black-and-white photo of industrial tank installation with smokestacks and factories in the background](https://waterhistoryphl.org/wp-content/uploads/emscher-tank-essen-nord-germany.jpg?w=300)
![Black-and-white photograph of a man in a hat standing in a brick trench](https://waterhistoryphl.org/wp-content/uploads/grit-chamber-essen.jpg?w=300)
Grit Chamber, Essen, Germany
![Black-and-white photo of heavy machinery](https://waterhistoryphl.org/wp-content/uploads/sludge-presses-for-grease-recovery-bradford-england.jpg?w=300)
Sludge Presses for Grease Recovery, Bradford, England
![Black-and-white image of a tray with three compartments and four small glass cylinders](https://waterhistoryphl.org/wp-content/uploads/drain-water-from-sludges-emscher-tank.jpg?w=300)
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
![Black-and-white image showing a man standing in a large concrete half-pipe](https://waterhistoryphl.org/wp-content/uploads/thomas-run-sewer-outlet-under-construction.jpg?w=300)
Thomas Run sewer outlet during construction
![Black-and-white photo of an ash car, side view, in the doorway of a barn with trees behind](https://waterhistoryphl.org/wp-content/uploads/Wingohocking-Ash-Cars-Cox-p79b.jpg?w=300)
Car 2615, Brill, 1909, Brill Curtis trucks
![Black-and-white diagram of a Philadelphia ash car](https://waterhistoryphl.org/wp-content/uploads/Wingohocking-Ash-Cars-Cox-diagram.jpg?w=300)
Philadelphia Ash Service – Plan, Side and End Elevations of Car
![](https://waterhistoryphl.org/wp-content/uploads/2008.001.0055_edit-pdf.jpg)
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
![Six people and dozens of sandbags performing a load test on a concrete pipe, 1914](https://waterhistoryphl.org/wp-content/uploads/Load-test-concrete-sewer-pipe-1914_20040920278.jpg?w=300)
Pipe Test, 1914
![Spring Garden Sewage Experiment Station, used to test water filtration methods](https://waterhistoryphl.org/wp-content/uploads/DR_SpringGardenSewExpSta1911.jpg?w=300)
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
![Devereaux Street Sewer on the cover of Philadelphia magazine, 1911](https://waterhistoryphl.org/wp-content/uploads/DR_June1911.jpg?w=300)