correctly. It was
close to being a square image. Would a pdf version be better.
Thanks,
Roderick Wall.
Original message From: Frank King Date:
3/1/19 11:48 pm (GMT+10:00) To: Sundial List Subject:
Re: Gnomon Gap Puzzle
Dear All,
I have a simple rule with my puzzles: wait
Dear John,
Many thanks for your seal of approval...
> Bravo - two quarters of a double horizontal dial!
A fair summary, but note that it doesn't suffer from
the knife-edge gnomon bug that most double horizontal
dials suffer from. Fancy going wrong at noon of all
times of day. Grrr!
The
Dear Alastair,
Many thanks for your kind words...
> Your design is wonderful...
I hope you enjoy the book.
You ask...
> ... have you come across the term 'azimuth
> circles', how would you define this term?
I have heard this term in several contexts.
In an astronomical context, any great
Dear All,
I have a simple rule with my puzzles: wait for a reply from Geoff Thurston and
then reveal all. The time has come!
In the recent spate of messages, both Bill Gottesman and Steve Lelievre were
very close. Bill is the only person to suggest an azimuthal dial with
vertical styles
Happy New Year, Frank,
How about a T-shaped dial consisting of a vertical east dial backed by a
vertical west dial and sharing a solid sloping roof whose edges act as the
gnomons. The hour lines close to noon could be marked as a horizontal dial
on the "floor" of the dial.
I think that this
Frank,
May I have a second try at answering your quiz?
I'm still not doing it for a nickel, though.
My new suggestion would be much the same set-up as for my first
suggestion, but this time I feel sure the dial face can be entirely
within the noon gap area (that is, assuming the noon gap is
: Gnomon Gap Puzzle
Dear Maciej and Sara,
Gosh. Those are really incredible dials.
The Nested L-shapes of the chapter rings on the Jacques Le Marie dial are very
cleverly set out. I wonder how big a market there was for this kind of dial!
Maciej's description of a Nuremberg
Diptych - The shadow
Hello Frank,
Could the space be a north-south alley, street, or park between two
buildings? The vertical sides of the buildings adjoining the space can be
seen as two vertical gnomons for an azimuthal dial. You would lay out the
morning hours to the west of the eastern building, and the
Dear Maciej and Sara,
Gosh. Those are really incredible dials.
The Nested L-shapes of the chapter rings
on the Jacques Le Marie dial are very
cleverly set out. I wonder how big a
market there was for this kind of dial!
Maciej's description of a Nuremberg
Diptych - The shadow was cast by the
@gmail.com;
Wysłane: 16:41 Wtorek 2019-01-01
Temat: Re: Gnomon Gap Puzzle
> Dear Maciej, John and Steve
>
> Congratulations on coming up with several
> ideas. I should have asked your advice
> several months ago!
>
> Although your ideas seem wildly different,
> they all s
Subject: Re: Gnomon Gap Puzzle
Dear Maciej, John and Steve
Congratulations on coming up with several ideas. I should have asked your
advice several months ago!
Although your ideas seem wildly different, they all share elements of the
actual design which I shall reveal in due course.
Maciej
.
I browsed my archives, unfortunately I was unable to find the image.
It was a truly ingenous design !
Regards,
Maciej Lose
Od: "Frank King"
Do: ml...@interia.pl; john.f...@keme.co.uk; steve.lelievre.can...@gmail.com;
Wysłane: 16:41 Wtorek 2019-01-01
Temat: Re: Gnomon Gap Puzz
Hello again, Frank,
A quick postscript to my first answer ... I can also get my 4 sub-dials
by using parallelograms arranged in NS planes at the sides of the dial
face, and sitting on the horizontal dial surface. The skew of the
parallelograms would be such that they provide polar styles, so
Dear Maciej, John and Steve
Congratulations on coming up with several
ideas. I should have asked your advice
several months ago!
Although your ideas seem wildly different,
they all share elements of the actual design
which I shall reveal in due course.
Maciej: I am most grateful to you for
For Q1, my solution would be a bit like the set up already suggested by
Maciej Lose from Hans Troschel. Instead of having two wires in a
diptych, I would use a rectangular sheet of material. It would be set up
with one pair of opposite edges on an East-West line, and the other pair
parallel
Dear Frank,
For your question 3: Could you be designing a vertical dial for an interior
south
facing wall with a 'Velux' type window (or any rectangular glassed-in
section) in the sloping ceiling above? I would have thought it would work
and could be as attractive as you cared to make it!
Dear Frank,
I'm not sure if this follows Your idea, but I think the the answer, by Hans
Troschel, is in the collection of History of Science Museum in Oxford.
Unfortunately no direct link is possible, so one has to use database search to
find it:
https://www.hsm.ox.ac.uk/database
Diptych
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