"Vincent LE CHEVALIER" <lec### [at] ctiecpfr> wrote in message
news:402f2ca1@news.povray.org...
> Hughes, B. wrote:
> > This would probably be called demonstrational armillary, since the
> > observational ones tend to have fewer rings and would be larger.
> >
> Indeed, it would be truely difficult to make precise observations with
> this kind of device. Actually, there was an other, simpler instrument
> called "astronomical ring" that could serve such purposes. See
> http://www.galerie-kugel.com/expo_en.htm for some beautiful pictures of
> those instruments. I saw the exposition, and it was amazing...

That must've been great to see alright. I like the glass celestial sphere
with orrery inside, there in the mechanical section. I'm wasn't aware of
such diversity in these kinds of instruments. The astronomical rings seem
akin to sextants. Thanks for showing the site with those.

Bob H.

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