The History of Sanitary Sewers: "Over the past ten years, Jon Schladweiler, the Historian of the Arizona Water & Pollution Control Association, has researched and collected materials related to the history of sewage conveyance systems. Many of these have been displayed in a traveling exhibit entitled 'The Collection Systems Historical Photo and Artifacts Display.' "
Who would have guessed that there was a website devoted to the history of sewers? I like it mainly for this photo. Link via Incoming Signals.