Mill Creek Sewer under construction, 1883
Bridge Street Draw, Cofferdam, ca. 1896
PWD water tech at the Philly Home Show, 1960 (detail)
Torresdale Conduit work gang, 12/18/1906
Nine visiting nurses ready for work, ca. 1909
Includes activities to maintain the healthfulness of the city, and the animals (such as pigs) and diseases (such as cholera, yellow fever, and typhoid fever) that were the objects of public health efforts.