 
		 
		 
		Last gasp of the Schuylkill Interceptor, December 20, 1956
 
		The Water Supply Problem of Philadelphia, 1899
 
		Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder
 
		Drain water from sludges obtained from sedimentation, septic and Emscher tanks
 
		Outhouse over the Schuylkill near Pottstown
 
		Pegg’s Run, Northern Liberties (Watson’s Annals)
 
		Swimmers at Pier 126, Delaware River, July 15, 1918
