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Philadelphia Water Department
Last gasp of the Schuylkill Interceptor, December 20, 1956
Outhouse over the Schuylkill near Pottstown
36. [Laboratory] Left to right: raw water, settled water, filtered water, ca. 1943
35. [Laboratory] Turbidity test ca. 1943
Laboratory Alkalinity test, ca. 1943
32. [Laboratory] Bacteria count
31. [Laboratory] Taste and odor test
Baldwin Locomotive Works
Water Before and After Roxborough
Keystone Saw Works