Item Types Image

Black-and-white photograph of a man in a hat standing in a brick trench

Grit Chamber, Essen, Germany

Black-and-white image of two cylinders on a white surface

Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder

Black-and-white photo of heavy machinery

Sludge Presses for Grease Recovery, Bradford, England

Black-and-white image of a tray with three compartments and four small glass cylinders

Drain water from sludges obtained from sedimentation, septic and Emscher tanks

Black-and-white line graph showing two jagged lines on a grid

Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913

Black-and-white image of a brick sewer outlet that drains into a creek with trees and a hill behind it

Thomas Run sewer outlet at Cobbs Creek

Black-and-white image showing a man standing in a large concrete half-pipe

Thomas Run sewer outlet during construction

Black-and-white image of a body of water with trees and shoreline in the far distance

Delaware River at Arch Street from the New Jersey side, 1914

Black-and-white image showing sewer outlet, retaining walls and body of water

Cohocksink Sewer System outlet at Laurel Street

Black-and-white image of a table with numbers in columns

Bacteria in Delaware River, Torresdale Filters, 1913

Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia

Captain Sewer and Michael Nutter, 1998

Captain Sewer and Michael Nutter, 1998