Topics Technology & Engineering

Philadelphia Underground, Jan. 29, 1961

“Philadelphia Underground,” Jan. 29, 1961

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

Rudolph Hering

Rudolph Hering

Sewage collection and disposal plan

Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912

Diagram of the Philadelphia Water Department's wastewater treatment process

Wastewater Treatment Process diagram

Spring Garden Sewage Experiment Station, used to test water filtration methods

Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911