Hello All,
If they just use the tip of the angled pieceas the gnomon (or nodus) and
forget about using the edge of angled piece, then it could work.
I have been wondering about the practical realities of the use of a nodus
that is 200 - 300 feet away from the dial face. Wouldn't the
John, how does this structure compare in height/scale to the Kitt Peak
structure?
The area required to accomodate the shadow of a nodus that high for a good
portion of the daylight hours must be quite vast - assuming that it would
operate year round. The casual user would also have to be
Hello All,
As previously mentioned, the earth is not a perfect sphere, and is
distorted by the effects of gravity. So, is it "flattened" at the poles, or is
it "elongated" at the equator? Is it a combination of both effects?
I can envision a stretching effect at the poles, and a bulging
Perfect!
Thank you Richard!
Jim Tallman
Sr. Designer
FX Studios
513.829.1888
- Original Message -
From: Richard Koolish [EMAIL PROTECTED]
To: sundial@rrz.uni-koeln.de
Sent: Tuesday, February 03, 2004 11:01 AM
Subject: Size of degree of latitude
Hi Tony,
Most of what you describe is done to fool spam filters, I think.
Many ISPs are implementing spam filters on their end to try to stem the tide
of junk mail, which overload their servers. Most of these filter programs
identify certain message elements that make them think an e-mail is
Hi John,
I just laid out a 45° East decliner for NYC last night and had no problems
either. There is an option in one of the pull down menus that allows you to
project the hour lines back to the foot of the gnomon, and it worked well.
Everything lined up as it should. Perhaps the gnomon on your
Hello All,
I remember reading about a huge pyramid sundial that was to be erected in
England near one of the main freeways. I believe that it was scheduled to be
completed on the summer solstice of this year.
Have any of the UK listmembers seen anything about this dial lately? Has it
Hi John,
The gnomon would be on the outside of the window and the plastic film on
the
inside, so drilling a hole is unnecessary if you use adhesive for the
gnomon.
This arrangement is more complex than it might appear at first thought. Mike
Shaw has been down this road and that is what his
Hello John,
A glass artisan in Japan contacted me and told me that it is customary
there
to put a protective glass or acrylic cover on the outside of stained glass
windows to prevent damage. He said that the covers are usually between 2
and 10 inches away from the window and wanted to know
Hi John,
Perhaps I was a bit too general in my last posting, because I can see
problems if the protective acrylic window was bowed and not perfectly flat.
Looking at some of the replacement windows in my garage door, the acrylic
ones are not as flat as the glass ones, and I would assume that the
Hi Tony,
It is probably worth mentioning that it is best to avoid any stresses and
metal-to-glass contact with any method of mounting anything (such as a
gnomon) to glass.
Normally I would suggest slightly oversize holes to allow for any thermal
expansion differential between the materials
Hello Piero,
Try this on for size:
http://emr.cs.iit.edu/home/reingold/calendar-book/Calendrica.html
Best,
Jim Tallman
Sr. Designer
FX Studios
513.829.1888
-
Hello All,
Today I saw a vertical wall dial with an adjustablegnomon/style that
has a hinge at the point where it connects with the dialplate.
The dial is a south facing model and 12 noon is directly on the centerline
of the dial and the gnomon. Obviously longitude and EoT correction would
John,
I think Fer's sundial program will tell you the amount of sunshine that any
particular site will receive, and I think it takes into account the
different sundial types and declinations. It will give you the sunrise and
sunset times as well.
It now has an easier name to spell as well, it
A particularly fierce computer glitch knocked my systems out of action
for the weekend, and all weekend messages were lost. Please bear with me
as I get back up and running.
Any personal messages from list members since mid-day Friday, please resend.
Thank you all for your patience,
Jim
Hello all,
I think both John and Dave should accept a well-earned pat on the back
for creating such a vivid and unique resource.
Absolutely! Well done!
Jim
-
Hi John,
One way that quickly comes to mind would be to go to the home center store
and get a good sized (18-24) paver or other flat hard surface, such as a
stepping stone, etc. You can probably get 24 diameter concrete stepping
stones at a landscape supply place as well.
Really, if you can
I would just add to Jim's suggestion a bag of dry sand raked flat
under the paving slab, this will help the paver to bed down properly.
BTW this technique is good enough for using as a footing for building
certain types of frame houses in the UK.
Absolutely! I forgot to mention that!
Hello all,
This recent discussion has me wondering about some of the old dials in
Europe, and the declination lines on some of them. How well has the
precision of these lines held up over time?
Just for general discussion purposes, if I put a declination line for a
specific date on one of my
Hello Les,
We use a website occasionally to source stone, perhaps you will find it useful:
http://www.findstone.com
Good luck,
Jim Tallman
www.artisanindustrials.com
[EMAIL PROTECTED]
Les Lombard wrote:
If there are any members on this list
that could supply
You wrote:
Dear dialists,
Do you remember Joerg Heitkoetter's Java Applets that draw
on an Earth's map the actual position of the Sun and the Moon?
Our associate Jose Luis Hidalgo Sanchez reports us about
the following URL
http://www.mapmaker.com/sunclock.asp
which contains a FREE
Sara wrote:
When I compare the quality of this modern day junk to that of the
handmade instruments of the past, I want to cry. The same goes for
the garbage sold as sundials in garden centers. Is this just do to
ignorance, laziness, or corruptness?
I would guess that a combination
Thank you Fred for posting the sad news.
Ron will be missed and he has helped me personally on several occasions. He
was also kind enough to invite me for coffee during my August trip to
California.
I have always wondered about what might happen if any serious ill came to
any of my online
Hello All,
As I scanned my home page this morning I found an interesting press release
from The Royal Swedish Academy of Sciences on cnn.com. This release had to
do with new images of the sun that have been recently captured with their
1 meter telescope in the Canary Islands.
These are some
Hi David,
It is hard to comment on this particular situation without seeing the
problem, but I agree with most of the comments expressed so far, especially
Tony's.
The one new thought that I have that has not been mentioned yet is that I
would take a two step approach. The first thing I would
Hello All,
I have been working on a vertical sundial and I have a question.
This South facingvertical has two time scales on it, one at the top
that shows thehour numbers to use during the period of the year when
Standard time is in effect, and one at the bottom to show the hour numbers to
Josef, Art, and All,
Yes, this was the monument I saw on the TV show. Thank you Josef for
tracking down the link! It was very interesting to be able to see it from
the air, to really see its scale and consider its functionas opposed to
seeing it from plaza level forjust aminute or soduring
Hello All,
Irecently saw a show on the Travel Channel (cable tv) which may be of
interest to those who have access to it.
The show was called "Voyager's Adventures" with Geraldo Rivera, and this
particular installment chronicled an expedition up the Amazon River in
Brazil. When they got to
Hello Art,
"The rate of change of the
declination at the equinoxes is 24 arc-minutes per day, approximately equal to
the size of the image of the solar disk, so if the spot is perfectly centered on
the line at dawn, by dusk it should be nearly off one side. Actually, this
is cool, because
Hello All,
This is an interesting link, and I especially liked their mascot for the day
of unveiling! It looked like it was quite an auspicious occasion, and I
wish I could have been there to take it all in...around here people just
don't seem to get that excited about sundials...except me of
Hello All,
Where are the best current places online to get the precise time? The
site I used to use does not seem towork anymore.
Does anyone have any favorites?
Jim Tallman
Sr. Designer
FX Studios
513.829.1888
Hello Brooke,
I was surprised to see so many recent sundial patents on your page. I
always figured that the sundial was had been around so long that it would be
hard or needless to patent one. I can see a patent on something like Daniel
Wenger's very unique sundial, but some of the ones I saw
Hello All,
Thank you, international friends, who have so eloquently expressed your
feelings regarding the horrific events that happened yesterday here in the
USA. I have been a list member long enough to have seen several major
political events play out on the world stage, and Ihave on each
Hello Bill/All,
I have a lot of long term experience with some of the products mentioned
which may be of use to you. Here at FX, we have been using several
solutions to the problem of gluing dissimiliar materials together for
exposure out of doors.
We originally came up with the British
Hello Rui,
Welcome to the list! We need youthful (intellectually and otherwise)
energy once in a while to shake things up and get things going. I am sure
you will find the answers to your sundial questions here...the level of
knowledge is quite amazing at times.
Here is the place I use
Hello Harriet,
The reference meridian is 75W for EST, and here in Cincinnati (approx 84W30)
we are about 38 minutes behind the clock for local noon. At certain times
of the year the difference between unadjusted dial time and watch time can
be almost an hour! The official time zone lines weave
Hi Fernando (and All),
This time of year, when DST arrives,I always harken back
to my design school days. We always seemed to have way too much work to do
for the time alotted, time consuming work such as full color renderings
(artwork) and product prototype models, and we wound up having
Hi Gordon (and All),
I was not aware that Indiana determined time by county, and we have lots of
guys from Indiana who work here at FX. They did not even know that!
This discussion leads me to the next logical question for a diallist trying
to design a compensated sundial for someone far away
Hello again,
I just did some checking...
If you go to mapblast.com and enter the address of the place,
it returns a map. Just above the map, near the global coordinates of the
place,there is a small link where you can find out the
weathernear that place...and along with that info it
Hi Guys,
Actually, the commercial thing has been taken far more literally on the list
than I perceive it. The assumption has been made that the commercial
announcements would be directed at the list members. I agree with Tony's
comment that you can't sell sundials to sundial makers because
Hello All,
While I really treasure the intellectual discourse that
predominates the discussion (most of the time) on the Sundial List, I do
appreciate the occasional announcement of a new dial for sale. Since we
are presumably engaged in developing "real" dials, as opposed to the more
Hello All,
What a fascinating observation on the practical aspects of a
rainbow...thanks for the commentary John. I have always been interested in
rainbows, ever since my third grade teacher took the whole class out trudging
through the fields after a rainstorm,looking for the pot at the
Hello,
I agree that the dial in question has problems, as I doubt that the creator
could be smart enough to figure out a gnomon with a wedge effect like the
one shown. It looks really scary too, design-wise.
For something really hideous, check out this one from the same company.
Hello All,
I have been watching the adhesive thread for some time, and
tend to agree with John about the merits of silicone.
The best that we have found to usein our structural
architectural applications (built to last) is Dow Corning 795. It can be
had in a multitude of colours, but we
Hello All,
Claude wrote:
"The advent of satellite technology has made all this very
much ahistorical question. Is it true that US Naval midshipmen no
longerstudy use of the sextant? You can only hope that the GPS or
radio inyour lifeboat has good batteries."
I certainly hope that this is
Hello All,
I have had several requests for the Supervision link
so...
The address is below for their web page. They have done
alot of work for Disney in Florida, maybe in California too. They did a
fiber optic pavement system at Epcot that is really great...the strands were
cast into the
Hello Mike,
There is a company I have dealt with in the past called Supervision
International that does high-tech (whatever that means) signs utilizing
fiber optic strands. They also have a unique lighting system for the
residential market that uses a centralized light source, and fibers to
Hello all,Around here sandblasting stone is fairly
economical, and signshops whonormally cut vinyl for signs can also cut a
material that will resist theabrasive sand for some period...works sort of
like a template. The materialis cut to file specifications with their
standard knife
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