Dear Alexey, Tony Moss makes a good point.
I like your proposed "fix" though I am not sure that the hour lines are suited for an underside gnomon. What happens at 12 o'clock? Tony knows all about this! The hour-numbers don't tie up very well with the hour-lines either. I'd say: Good try, now do it again and get it right second time! Frank King Cambridge, U.K. --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
