Dear list: I couldn't resist - it happens so rarely in December near
declination -23 deg! - Woody
http://sunny.astro.washington.edu
Dear gnomonic world,
We are pleased to announce the public launch of our SundialCam website
http://sunny.astro.washington.edu
at
urday, December 10, 2011 2:01 PM
Subject: New website with live webcam view of large sundial
Dear gnomonic world,
We are pleased to announce the public launch of our SundialCam website
http://sunny.astro.washington.edu
at which you can see a live image, updated once per minute (even at
night!
Dear gnomonic world,
We are pleased to announce the public launch of our SundialCam website
http://sunny.astro.washington.edu
at which you can see a live image, updated once per minute (even at
night!), of the large wall dial on the Physics/Astronomy Building of
the University of Wash
Hi Guys:
On March 1, the town of Sahuarita Arizona inaugurated their new Municipal
Plaza. It was a big deal with a military band, speeches and tours of the
new facilities. The centerpiece of the plaza is a large sundial that I
co-designed with architect, Jake Honeycut. The base of the
Chris Lusby Taylor wrote:
An alternative approach doesn't require thin or closely spaced lines. This
is to use a nonius (after its inventor Pedro Nunes) which uses diagonal
lines at an oblique angle to the radial hour lines. The position where the
shadow crosses the diagonal line indicates the e
Tony Moss added:
>With the photoetching process I use for sundials I've
settled on a line >width of 0.35mm. The technology will allow much
finer lines to be >achieved but at the expense of depth, very long
etching times or missed >bits which then have to be engraved by
hand. A line depth
Have you ever tried to squeeze one minute timelines onto an eight inch dial
face? It's almost impossible.
If I remember correctly, Tony said that his fine photoetching process could
just barely do this on an eight inch (20 cm) bronze face. But with my carved
stone sundials, I must have at
John Carmichael wrote:
Have you ever tried to squeeze
one minute timelines onto an eight inch dial
face? It's almost
impossible.
If I remember correctly,
Tony said that his fine photoetching process could
just barely do this on an
eight inch (20 cm) bronze face. But with my carved
stone sund
John Carmichael contributed:
SNIP
>
>Have you ever tried to squeeze one minute timelines onto an eight inch dial
>face? It's almost impossible. Tony and I had this discussion awhile back,
>and wondered what was the smallest diameter dial face possible to make that
>would have one minute timelin
Large sundials do have the potential of being more accurate. Essentially a
sundial measures an angle and that
angle is related to the time. When measuring an angle one achieves more
accuracy with a larger angle scale.
The problem is that a shadow cast by a central gnomon is not a very good
device
PROTECTED]>Cc:
<sundial@rrz.uni-koeln.de>Sent: Tuesday, August 07, 2001 7:22
PMSubject: Re: large sundial> Well, all sundials (except rare
focusing dials) cast a shadow whoseblurred> edge is 2 minutes of time
wide, corresponding to the 2 minute (of time)width> of the s
uot;alexei.pace" <[EMAIL PROTECTED]>
Subject: large sundial
> Hi all
>
> I would like to know what problems may be anticipated in the construction
> of a large (4m x 4m) vertical sundial ? I believe any errors in the
> calculation of the wall's declinat
, VT
In a message dated 8/7/2001 5:20:45 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
> Hi Alexei, hi all,
>
> I think that an other problem of a large sundial, is the accuracy of the
> shadow. Will the shadow be sufficiently "sharp" ?
>
> Good luck and sun
Hi Alexei, hi all,
I think that an other problem of a large sundial, is the accuracy of the
shadow. Will the shadow be sufficiently "sharp" ?
Good luck and sunny skies !
Alain MORY
48°N7°E
"alexei.pace" a écrit :
>
> Hi all
>
> I would like to know what pr
I would like to know what problems may be anticipated in the construction
of a large (4m x 4m) vertical sundial ?
I believe any errors in the calculation of the wall's declination will be
magnified by having a large dial?
would it be wise thus to use analemmas to derive the civil time/ ?
Is
Greetings, fellow dialists.
Here's news of a big and handsome new dial. I've submitted the text
below for publication in the Bulletin of the British Sundial Society
together with a couple of photos which, regretfully, I have not the
means of reproducing here. They were of the gnomon in course o
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