This might be of interest to dialists.
https://www.theguardian.com/science/2019/aug/30/compasses-to-point-true-north-for-first-time-in-360-years
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This might be of interest to dialists.
https://www.theguardian.com/science/2019/aug/30/compasses-to-point-true-north-for-first-time-in-360-years
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial