Places Pennsylvania

Black-and-white image of the title page of a government report

Perkiomen Water Supply Surveys, 1866

Outline Map of the County and City of Philadelphia and Vicinity (wd000516)

Outline Map of the County and City of Philadelphia and Vicinity, 1883

Sewage collection and disposal plan

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