Hi there, I'm trying to resolve what seems like a conflict of information. Some resources say that a vertical dial is simply a horizontal dial rotated 180 degrees. But when I used Hristov's spreadsheets the calculated angles are different. Which is correct? Or what am I missing? Also I thought I saw a photo of a polar dial with upturned ends to catch more hours, but I can't find it now. The turn-up was not a full 90 degrees.
Thanks, Tom Laidlaw --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
