


Grit Chamber, Essen, Germany

Sludge Presses for Grease Recovery, Bradford, England

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

Thomas Run sewer outlet during construction

Dobson’s Mill, 1884, from History of Philadelphia by Scharf & Wescott

A Day in the Ma’sh – Oil Refinery

Frankford Creek: Sad History of an Urban Stream title page

Wood truss drawbridge, Orthodox Street over Frankford Creek, rebuilt 1899

Bridge Street Draw, view through bridge, July 26, 1897

Bridge Street Draw, July 26, 1897
