When you are in the water business for a long time, it is inevitable that you will either be asked or told about the reliability and accuracy of divining rods. I even once had a colleague who, when searching for the edge of water under an ice cover, would use bent coat hangers to locate the edge of the stream bed, so as not to run his ice drill into the rocks. You might think that this USGS paper from 1917 would have put the whole topic to rest long ago, but it hasn’t. People still believe what they want to believe.

https://pubs.usgs.gov/wsp/0416/report.pdf

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