WHAT?!? Elvis is *dead*???
No, It is not true. This is old news. I engaged in an interesting exchange
of information with Alex Rawls and analyzed the tower as a gnomon for
Islamic prayers, The whole data does not support the thesis. The Asr
prayer line curves the other way. You have to
Even in Kunming, a much more culturally Chinese area, people liked to
quote the time-honored maxim that the mountains are tall and the emperor
is far away.
I had to think of the line from Fiddler:
Is there a proper blessing for the Czar?
Yes, 'May God bless and keep the Czar --- far away from
Roger Bailey wrote:
The conversion of the
presentation to an article fro the compendium is stalled at 80% complete.
This follows the classic 80 20 rule defining work progress.
Which is to say that the remaining 20% of work will consume the *other*
80% of time?
Dave
All,
A friend of mine (Joe Rao of New York City) just sent me this neat link.
Check it out!
-- Roger
A different way to display time on the green time line.
This is a real cool clock! I believe it comes from a Dutch web site.
Yes! Some really cool things you can program in
I have uploaded Marton Géza's magnificent sundial calendar to:
http://www.twigsdigs.com/2010/calendar_2010.pdf
Thank you, Bob!
Merry Christmas
Dave
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https://lists.uni-koeln.de/mailman/listinfo/sundial
The poor image attached might just
be small enough to get transmitted but it certainly shows the extensive
damage.
Wow, looks like most STOP signs in the southern US, peppered with bullet
holes... Some kinds of stupidity are universal, I guess.
Dave
The space-holder site seems to be safe, for what that's worth.
I think Fabio hit it on the head, with the domain registration expiring.
Looks like it was successfully re-registered, so once the DNS information
is passed through the system, it should return to accessability.
Unfortunately, the IP
If I can't get a good result because the location is a new home in a new
development, I go to bing.com and check it on their maps/aerials. They
seem to have more recent aerial imagery much of the time.
Jim Tallman
Unrelated to dialing, but whereas I usually prefer Google maps and aerial
and
Use the best clock of all, the Sun (or Earth, if you prefer that new
notion of Copernicus') - a photocell to track the Sun, advancing the
mechanism one tick per day.
Dave
Bill
All we need now is a good clock to control the mechanism which compensates
for the EoT?
Brian Albinson
-
Larry, I agree that waiting an hour (or 15 minutes, even) between brief
illuminations would make it less usable. A couple of suggestions:
A bunch of fiber strands spread across the bottom of each (larger
diameter) well, converging into a single lighted spot. The brightest spot
indicates the
Obviously, your insurers are well familiar with US litigiousness (and
perhaps, incompetence!)
Dave
My insurers wanted $2,000,000 indemnity to cover the possibility of US
clients falling onto a dial gnomon. They actually suggested building a
wall around the dial to keep everyone at a safe
Excellent project, Aimo! I look forward to seeing this evolve.
Dave
As some of you already may have noticed, I have recently worked with my
electrical sun dial project. Instead of a shadow the sun's position is in
it calculated from the output of two or more solar panels. I have now
tested
It was interesting to see responses change, as time went on - from
initially saying that it was simply not possible, to some 'lateral
thinking' which could actually fulfill the design envisaged by our
Mr Phillips
Alison, that's the beauty of a group like this one, and something I've
Andrew James wrote:
If, instead of standing on the central month scale, the user finds and
stands on or near the hour number which casts his shadow onto the
appropriate date, the numbers might be arranged to the South rather than
to the North of the centre. This requires more action on the
Good luck, Alison!
I'll let the real experts address the weight of evidence, but you are
quite correct, and Mr. Phillips is wrong. While many types of sundials can
indeed be adjusted to operate in any location, they cannot be adjusted
to arbitrary orientation.
For the simplest argument you might
Also curious, I don't recall any mention of the two auxiliary dials, with
the cherubim holding their own styles, one 4 hours fast, the other 4
hours slow relative to the main dial. And what about the apparent four
additional styles, one at each lower corner of the window frames?
Dave
Dear John,
I just ran across this photoset today.
Along the same lines as the Prague clock, and reminds me of Jim's
beautiful astrolabes...
http://www.flickr.com/photos/seangallagher/sets/72157604323095889/detail/
or
http://tinyurl.com/5fjs3q
Dave
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Some time ago someone posted a link to a painting by Salvador Dali that
included a sundial.
Could someone point me to it again?
I found this:
http://peregrinations.kenyon.edu/vol1-3/gower.pdf
== Try this: ==
Since it has none, I suppose a sundial could be considered the timepiece
with
As you
probably know, Britain (and England in particular) is filled with such
memories of the past and we tend to take them for granted until others
mention them!.
I find the same here, except our past is so recent, compared to yours!
Dave
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Very intriguing idea, Edley!
Should be great fun experimenting.
I'm going to look for some trial ray-tracing software...
Dave
Some time ago an idea for a nodus on a Large Sundial appeared to me.
It is the shadow of a thin-walled transparent sphere. This can be seen
simply in the shadows of
World's cheapest sundial:
http://labs.blogs.com/its_alive_in_the_lab/2007/09/our-autodesk-la.html
Dave
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https://lists.uni-koeln.de/mailman/listinfo/sundial
Simon wrote:
Of course, if you had C, C++, FORTRAN, LISP, COBOL,
JAVA, Python, Scilab, Euler, Pascal, Basic, etc on
your PDA, then you might look at my web site. I added
the Python, Scilab, and Euler code for dial design
just this week.
What?!? No SNOBOL?
On the other hand, Forth would
I happen to own a small version of this exact item. I must concur with
Sara that it is not what it purports to be. I picked up the small (about
5 high) version a few years ago as a curiosity - lamenting all the time
that the gnomon design and placement make the whole thing useless. This
is
Interesting article from a 1949 Mechanix Illustrated...
http://tinyurl.com/37ff9x
Dave
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https://lists.uni-koeln.de/mailman/listinfo/sundial
While Willy is absolutely correct, the part about knowing and computing
for the shape of the dish is probably the real killer task.
This is an application where I would advocate the empirical approach:
Properly orient the dial face and style, then manually lay out points,
with a watch in hand.
Concerning equatorial tables, people seem to be looking at recent patents
for ELABORATE designs (conical rollers and such). But the original Poncet
table is quite simple. I made my 1977 prototype out of wood, with a piece
of Formica for the inclined plane on which one end of the table slides.
The Patent for Porter's reflecting telescope is available directly from
the patent office's online
site at a huge long url, which is too long to type in or put on a single
line.
For future reference, there's an easy fix for that problem:
Once you have navigated to the site with the long URL,
Malcolm McClure responded to M. Jacquelin Hardy's questions
about building an anlemmatic dial:
I am still thinking about this one, but hope the following suggestions will
help. (Corrections to logic gratefully received)
I have seen a photo of a wall mounted analemmatic sundial at Greenwich. It
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