Hi all and thanks to everyone who responded to my questions. All very
interesting.
John I have never see a spiral clock face. Very interesting thanks. Learn
something every day.
That had me thinking. I think I have seen somewhere where there is a spiral
sundial. Where a spot of light marked
In 1997, I presented the following problem in The Compendium:
Problem: It is required to know in what Latitude of this terraqueous
Globe, an Erect South Declining Dial might be fixed to have these
Properties, viz. the Declination of the Plane, the Distance of the Substyle
from the Meridian, and
Rod:
Here are photos of actual clocks for sale with spiral faces. Notice that the
hour numerals in each turn of the spiral are radially aligned so that the clock
hands point to the same numerals in all the turns. A planar equatorial dial
would be the perfect dial type to use in this
Hi All
This is the golden ratio Sundial
https://www.youtube.com/watch?v=WA-WwWGUCA8=youtu.be
Best Regards
Marek
Od: rodwall1...@gmail.com
Wysłano: piątek, 23 czerwca 2017 23:36
Do: John Carmichael; sundial@uni-koeln.de
Temat: Re: Golden Ratio and Sundials
Hi all and thanks to everyone who
Hi,
Further to Fred's puzzle solution, here's an illustration from Martin
Gardner's /More Mathematical Puzzles and Diversions/ (Harmondsworth:
Penguin Books, Ltd., 1961) p. 74. The base angles are 72 degrees, the
apex 36 degrees, so a suitable gnomon for Abany in Western Australia,
Las
Dear All,
Referring to the Golden Ratio and Sundials, Donald
Snyder wrote:
I see nothing obvious except ... trivial
possibilities.
Try Googling Dodecahedral Sundial and you will
see many examples. Here is one chosen at random:
The Minor Planet Center at the Smithsonian Astrophysical Observatory has
named asteroid n. 315046 after amateur astronomer and sundialist Gianni
Ferrari.
*Gianni Ferrari (b. 1938) is the founder of the Modena Amateur Astronomers
Group. He has given many lectures and written several articles and
