Bill for Privy Cleaning, 1869
Bacteria in Delaware River, Torresdale Filters, 1913
Perkiomen Water Supply Surveys, 1866
Frankford Creek: Sad History of an Urban Stream title page
Logan Demanding Flood Relief, 8/18/38
Sewer Demand Taken to City Hall, 7/25/32
In The Storm’s Track, Philadelphia Record, 1882-09-25
“Philadelphia Underground,” Jan. 29, 1961
“Sewer Crawlers,” January 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
