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Fire Underwriters’ Map, 1949
Listening for leaks
Southwest Sewage Treatment Plant under construction, 1949
Main Pumping Stations for Philadelphia Drinking Water
Holmesburg Scrapbooks, Book 5
Holmesburg Scrapbooks, Introduction and Table of Contents
“A Snake That Will Be Straightened Out,” map of Frankford Creek with proposed changes, 1949
Electric Pump Installations at Lardner’s Point Pumping Station
Philadelphia Standard Distribution Valve
36. [Laboratory] Left to right: raw water, settled water, filtered water, ca. 1943
35. [Laboratory] Turbidity test ca. 1943
33. [Laboratory] Presumptive coli test
32. [Laboratory] Bacteria count
31. [Laboratory] Taste and odor test
29. Water sample collector [for laboratory]
11. Taking a water sample for laboratory ca. 1943