Hi,
If you own the NASS Repository CD, look through the back issues of The
Compendium for an article "Ring Dials (Farmers' Rings)" by Helmut
Sonderegger in issue 12(3), September 2005, pp.32-39. If you're not
actually interested in the math and prefer to get right to making one,
then run up Helmut's sundial design software for PCs, which is called
Sonne. One of facilities is to draw this type of dial in flat form which
you have to wrap into a cylinder shape. There may be other software
around that also does the job, Sonne is the one I happen to know.
Steve
On 2024-09-28 11:09 p.m., Donald Christensen wrote:
Thanks for the info. Do you know where I can find the mathematical
calculations? I'd like to make one
Cheers
Donald Christensen
0467 332 227
If you focus on what you lack, you'll lose what you have. If you focus
on what you have, you gain what you lack.
On Sun, Sep 29, 2024 at 3:29 PM Steve Lelievre
<[email protected]> wrote:
Hi,
It sounds to me like a reference to what is sometimes called an
Aquitaine Ring (because of a story that Elenor of Aquitaine gave
one to her husband to be). Also known as a Farmer’s Ring.
Modern ones are readily available. Just search the internet for
“Aquitaine Ring”
Steve
On Sat, 28 Sep 2024 at 20:53, Donald Christensen
<[email protected]> wrote:
In the book,
Sundials: Their Theory and Construction Paperback – 1 June 1973
by ALBERT WAUGH (Author)
He explained a portable sundial that worked similar to a
shepard’s dial. Instead of a gnomon that cast a shadow on the
pillar, this looked more like a ring. Instead of a shadow that
told the time, a beam of light showed through a hole in the
ring. There were groves on the inside of the ring. Time was
read by inspecting wherever the beam of light touched one of
these grooves. The ring would hang from a string.
Does anyone have any information about this sundial?
Cheers
Donald Christensen
0467 332 227
If you focus on what you lack, you'll lose what you have. If
you focus on what you have, you gain what you lack.
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