The Water and Drainage History of Philadelphia: A seven-part course
Two reports on the state of the Schuylkill River, 1867
Images from ‘The Water Supply of the City of Philadelphia by a proposed Aqueduct from Norristown Dam’
PWD Drinking Water Treatment diagram
“Speeding the Parting Guest,” Feb. 25, 1909
Typhoid bacteria diagram, 1905
“A Decidedly Mixed Drink,” April 6, 1899
PWD water tech at the Philly Home Show, 1960 (detail)
Lab tech, water cleaning demo, Philly Home Show, 1960
‘Gillette, All By Himself, Gets Fine New Idea On Germ Slaying’