“Speeding the Parting Guest,” Feb. 25, 1909
Typhoid bacteria diagram, 1905
Mill Creek Sewer under construction, 1883
“A Decidedly Mixed Drink,” April 6, 1899
Bill for Privy Cleaning, 1869
Sewer Demand Taken to City Hall, 7/25/32
Bridge Street Draw, Cofferdam, ca. 1896
Pennsylvania Hospital in Pine Street
PWD water tech at the Philly Home Show, 1960 (detail)
Lab tech, water cleaning demo, Philly Home Show, 1960