Dear Michael
The idea of reviving the Rep. Calendar (together with the corresponding
Greg. Calendar) is that of an intellectual fun and I would be amazed to
discover other implications.
There are many calendars still in use in the world even if to give us an
appointment it has become common to refer to the Gregorian Calendar.
If you really wanted a calendar to be hooked with precision to the
declination curves, I believe that the most authoritative is the Persian
Calendar, still in use in Iran and Afghanistan, which uses the names of
the zodiac for its months, that is, equating what gnomonists usually do.
I don't think that the creators of the Rep. Calendar had the intention
of reinterpreting the names of the zodiacal months (30° of longitude)
with those of their calendar even if, despite a bit of approximation,
these name could be a curious and entertaining option for people fasting
in astronomy but able to perceive the meaning of these names.
With all the limitations of this option by varying the latitude.
If I really had to make some considerations on declination curves, I
must say that lately I have rediscovered the use of these curves to
define diurnal arcs of whole hours, i.e. selecting the declination
values corresponding to diurnal arcs of whole hours and indicating this
duration on the curves.
There are not many sundials with these features but they exist and
provide useful and not commonly available information (Sundial Atlas
DE2758, CZ218, AT1291, IT14055, FR4881).
On the Rep. Cal. 230, today is the day of 'celebration of convictions' :-)
ciao Fabio
--
Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 9'' N, 9° 9' 54'' E, UTC +1 (DST +2)
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