Sewer Inspections: Vintage Images
Emscher Tank Installation at Essen Nord, Germany
Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
Captain Sewer and Michael Nutter, 1998
State Street pipeline construction, 1904
Belmont Filters construction, 1903
Upper Roxborough filter beds under construction, July 1902
Rudolph Hering
Outhouse over the Schuylkill near Pottstown