Can anyone help me with these
questions?
1) Is there a formula to
calculate what time it is on a clock if I know the temporal
hour?
2) Also, why does Waugh write
that the sun will never shine on a vertical direct south dial before
6 AM or after 6 PM? If sunrise is at 5 AM wouldn't a shadow be cast
on a vertical direct south dial?
3) On an ancient (Roman and
Greek) sundial was noon shown and defined when the edge of the
sun cast a shadow on the noon mark or as in later times when the
center hit the mark?
Thanks,
Noam Kaplan
