Dear Roger,
I forgot earlier to comment on one line of yours.
The later Braunschweig sundial, 1346 perhaps, represents a seismic
shift in the understanding time and the universe. The angles on this
dial are correct for a polar gnomon and would show equal time throughout
the seasons. This
I would like to say something about the oldest two sundials of the dome of
Braunschweig.
The drawing of the first one has done following the Erfurt rule. This rule is
opinion was written by the famous Johannes Dank. This rule is for temporal
hours and gives only the angles between the lines.
Many of you may be wondering why there is this focus on a couple of old
sundials on a medieval church in Germany. Let me offer a perspective. To me,
this is important because it represents seismic shift in the understanding of
time and the universe. The early dial at Braunschweig, perhaps 1334,
