Upper Roxborough filter beds under construction, July 1902
A.C. Abbott, MD
Portrait of Samuel H. Ashbridge, Mayor
State Sen. James P. McNichol
Rudolph Hering
Philadelphia Water Department chief engineer John Trautwine Jr., 1890s
Outhouse over the Schuylkill near Pottstown
Nine visiting nurses ready for work, ca. 1909
McConnell Germ-Proof Filters ad
Bureau of Water Spring Garden Testing Station, 1901
