 
		 
		 
		Torresdale Conduit work gang, 12/18/1906
 
		Finished Upper Roxborough filters, 1903
 
		Nine visiting nurses ready for work, ca. 1909
 
		Bureau of Water Spring Garden Testing Station, 1901
 
		Immigrant family, ca. 1900, nurse in black
 
		Water Before and After Roxborough
 
		State Road triple pipeline construction, 1904
