Philadelphia the Manufacturing and Industrial Capital map, 1906
1779 Revolutionary War-era map of Philadelphia and environs
Centennial Exhibition situation plan, 1876
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’
A.C. Abbott, MD
Portrait of Samuel H. Ashbridge, Mayor
State Sen. James P. McNichol
Philadelphia Water Department chief engineer John Trautwine Jr., 1890s
