Items

Historic resources from our archives - images, maps, documents, and more.

Black-and-white image showing several cubic measurements of various types

Volume of Sludge from 1,000,000 Gallons of Sewage

Black-and-white image of a graph with several captions

Diagram Showing Rate Between Bulk of Wet Sludge and Its Percentage Moisture

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 line graph showing two jagged lines on a grid

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

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

1914 map showing the plan for the collection and treatment of sewage in Philadelphia.

Plan for the Collection, Treatment and Disposal of Sewage, 1914