Subjects City Life

Laboratory Alkalinity test, ca. 1943

Making It Safe to Drink: Water History Video 2

Colored print showin all the booths, restaurants and other amenities of the fair

Ground Plan, Great Central Sanitary Fair, Philadelphia

Oak Lane Reservoir pipeline, 1904

The Water and Drainage History of Philadelphia: A seven-part course

Photo of a woman looking at a jar of raw, untreated sewage

Jar of raw sewage before treatment, 2000