Pennsylvania Hospital in Pine Street
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’
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903
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
