Hello everyone I am sure most of you on this list are familiar with the work Primitiae gnomonicae catoptricae by Athanasius Kircher. Its frontispiece depicts a reflective sundial drawn (designed) by Johannes Hevelius. If you havent seen it here you can view it: https://commons.wikimedia.org/wiki/File:Primitiae_gnomonicae_catoptricae,_by_Kitcher._Wellcome_L0006089.jpg I was wondering whether this drawing was just an exercise (book illustration) or parhaps an actual dial was created based on the disign. Does anyone know? I would appreciate any info on this. -- Best regards Darek Oczki 52N 21E Warsaw, Poland GNOMONIKA.pl Sundials in Poland http://gnomonika.pl
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