Items

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

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

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

Swimmers at Pier 126, Delaware River July 15, 1918

Swimmers at Pier 126, Delaware River, July 15, 1918

Devereaux Street Sewer on the cover of Philadelphia magazine, 1911

Devereaux Street Sewer, Philadelphia magazine, 1911