Old News: Two unusual underground rescues
Map Lover’s Monday: Looking for Cleaner Water
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Birch’s Views of Philadelphia, 1800
Cresheim Aqueduct
Early visions of Philadelphia’s airport
Down Under, Part 2: Beaver Creek as it appears today
Typhoid Fever and sewage tainted drinking water: An 1889 report from the Philadelphia Board of Health
Wooden Pipes in Philadelphia
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
