sundials in the Frankfurt region

[Sara Schechner]

I am going to Frankfurt, Germany on business in mid-February, and am 
wondering if there are good collections of sundials (portable or fixed) in 
that neighborhood that I might  visit, and whom I should contact locally to 
gain access to museum collections.


I am also interested in medieval and early renaissance mirrors, so if any 
of you know of collections of those too, please let me know!


Best regards,
Sara

Sara Schechner, Ph.D.
David P. Wheatland Curator
Collection of Historical Scientific Instruments
Department of the History of Science
Harvard University, Science Center 251c
Cambridge, MA 02138
Tel: 617-496-9542
Fax: 617-496-5932

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Resource Site

[Claude Hartman]

marvelous resources on the site of Helmer Aslaksen,
www.math.nus.edu.sg/aslaksen/teaching/heavenly.html

This is for his course, Heavenly Mathematics: Cultural Astronomy!

The number of topics of interest to this mailing list is enormous.
Look at the Astronomical Instruments. Not only sundials but there
is a link to his A Guide to ìThe Sun in the Churchî by J.L. Heilbron 



There are several links to javascript animations and videos done by
Nick Strobel (another good resource site) to illustrate topics that are
often discussed on this list.

Claude Hartman
35N 120W




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Re: Capturing web pages/sites

[Richard Mallett]

Reply to : Bill Thayer

>>  As for http://www.archive.org/ that *is* piracy.  It is illegal to
copy other people's work if it's still under copyright.  If you wrote a
book on dials in 1993, for example, it is illegal (and unethical) for me to
make it available to the entire Internet just because it's out of print. <<

Even books that are still in print appear on websites with
distressing frequency, which (of course) deprives the publisher of income. 
I have fewer qualms about out of print books on the web. 
Richard.


  E-mail from: Richard Mallett, 02-Feb-2004
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Re: Capturing web pages/sites

[Richard Mallett]

Reply to : Terry Dixon

>>  As I said there are many reasons for wanting to capture/archive web
sites and by blocking the process we may be losing valuable material for
future generations, imagine if all the books from previous generations had
bee lost by not putting them into libraries, that is unthinkable as is
losing much of the internet content. <<

... and, of course, so many books that were in ancient libraries (such
as Alexandria) have been lost, so we are forced to make guesses based
on artifacts (such as the Nebra disk, which may well have had
'accompanying documentation' at one time) - just to keep things on the
'solar' track :-)

Richard.


  E-mail from: Richard Mallett, 02-Feb-2004
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Re: Anniversary-of-a-date dial

[Claude Hartman]

unless
they are on the date of a solstice.   Tubes in a dial or in a structure 
would
light up for a certain time when the sun's declination has a certain 
value. 
In order for this to be only on one day the tube would have to be quite 
narrow

if close to a solstice (declination not changing rapidly).

For examples of illuminating objects INSIDE a building, see J.L. 
Heilbron's book

"The Sun in the Church".  He shows two examples in the color plates:
Plate 3,The Tower of the Winds at the Vatican and Plate 8, The Shrine of
Remembrance, Melbourne.  I could not find much discussion of the first 
example. 
However, he has some discussion of the Melbourne

application on page 288.

By the way, an excellent guide to this book is found on
www.math.nus.edu.sg/aslaksen/teaching/heilbron.html

Claude Hartman
Arroyo Grande, CA
35.13N  120.58W

Tom Egan wrote:

I'm looking for examples of dials that will illuminate a particular 
spot on the dial only on the date (and time of day, preferably) to be 
commemorated.  I recall running across links to tube-based dials in 
the past, but apparently didn't file them away.


Can anyone point me to such dials?  I want to show examples to a group 
of which I am a member.  If they are intrigued by it, the members 
might want to commission a dial.


This request is not limited to tubes.  Any clever idea is welcome.

You may respond to me off-line if you wish at [EMAIL PROTECTED]

Thanks.
Tom Egan
Costa Mesa California



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Re[2]: Website on CD?

[Marcin Egert]

Hello John,

> I'm going to experiment with a solution Edley suggested using a downloaded
> free program.

Ok. That's probably more convenient. And, as I know, it should work :))

> The only problem with using PDFs instead is that I have to make a separate
> PDFs of each page on the website (must set to Landscape with .25" margin);
> so that's five files (...)

Strange. As I mentioned I prepared a pdf file with your site and what
I have is ONE 17 MB PDF file. All enlarged photos are included, no
need for any separate files :)) I prepared it using a friend's Adobe Acrobat 5.


Regards,


Marcin


Good luck with your site :))



Plakaty astronomiczne - www.astrosklep.pl

Zegary sloneczne - to jest dopiero ciekawe 
www.zegarysloneczne.pl, www.gnomonica.com.pl
gustek(at)gazeta.pl, GG: 689152
 



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Re: Capturing web pages/sites

[Giovanni Bellina]

 
[EMAIL PROTECTED] wrote:
I tried to log on to the site quoted and get an error
message.  Does anyone
know if there is a problem with it?
Terry
 
Try these Link    http://www.webattack.com/get/httrack.html
if not work I can send the program via e-mail to you (3315KB).  
Have you a fast connection?
Giovanni Bellina

Re: Anniversary-of-a-date dial

[Larry McDavid]

I'm looking for examples of dials that will illuminate a particular spot
on the dial only on the date (and time of day, preferably) to be
commemorated...


At the 2003 NASS Conference in Banff, Helm Roberts described his work as 
architect of the Kentucky Vietnam Veteran's Memorial. Helm designed this 
large horizontal dial so that the shadow of the tip of the gnomon 
touches the engraved name of each fallen veteran on the anniversary of 
his death.


--
Best wishes,

Larry McDavid W6FUB
Anaheim, CA  (20 miles southeast of Los Angeles, near Disneyland)


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Re: Anniversary-of-a-date dial

[JOHN DAVIS]

 
Perhaps the classic "anniversary" dial is the vertical decliner by Christopher Daniel at Chatham, Kent.  It is known as the Nelson dial and it has a small circular spot in the dialface in the form of the Union Flag.  This commemorates not just the date, but also the time when Admiral Nelson was mortally wounded on his flagship HMS Victory during the Battle of Trafalgar.
 
Regards,
 
John
---Dr J R DavisFlowton DialsN52d 08m: E1d 05m)

Re: Anniversary-of-a-date dial

[aparena]

Dear all,

due to lack of time, I will be no longer able to follow this interesting
list. I'll appreciate if someone shows me how should I unsuscribe.

Thanks

Pablo Arena
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Salvador Dal� and Sundials

[Richard Langley]

While on a recent holiday in southern Florida, my wife and I visited the
Salvador Dalí Museum in St. Petersburg .
Currently running is the exhibition "Dalí Centennial: An American Collection"
which celebrates the 100th anniversary of the birth of Dalí. One of the
paintings on display is "Noon (Barracks Port Lligat)" which Dalí
painted in 1954 . The painting
shows a vertical sundial on the wall of the barracks. Can any of our Spanish
colleagues tell us if the building and the sundial still exist?

Of course, Dalí was no stranger to sundials as witnessed by his famous sundial
at 27, rue Saint-Jacques, Paris 5ème arrondissement
 constructed in 1968.

The image on the sundial bears a bit of a resemblance to his 1966 painting
"Self Portrait Sundial"


Are there any other Dalí sundials -- real or painted?

-- Richard Langley

P.S. Fredericton is home to Dalí's huge Satiago El Grande. It is on
permanent display in the city's Beaverbrook Art Gallery
, one of 4 Dalí paitings it owns. The
gallery was a gift to New Brusnwick from its native son Lord Beaverbrook (Sir
Max Aitken) who served in the wartime cabinet of Winston Churchill. Lord
Beaverbrook was chancellor of my university from 1947 until his death in 1964.

===
 Richard B. LangleyE-mail: [EMAIL PROTECTED]
 Geodetic Research Laboratory  Web: http://www.unb.ca/GGE/
 Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142
 University of New Brunswick   Fax:  +1 506 453-4943
 Fredericton, N.B., Canada  E3B 5A3
 Fredericton?  Where's that?  See: http://www.city.fredericton.nb.ca/
===

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Re: Anniversary-of-a-date dial

[Willy Leenders]

On the sundial website of Frans Maes
http://www.biol.rug.nl/maes/zonnewijzers/welcome-e.htm
you can see the equatorial sundial of Sint-Martens-Voeren in Flanders,
Belgium.

The shadow of a little ball in the slit-shaped pole-style hits the center
line of the time scale on July 11, the holiday of the Flemish Community.


On the sundial website of Frans Maes
http://www.biol.rug.nl/maes/genk/welcome-e.htm
you can see the Euro meridian in the subial park of Genk (Flanders,
Belgium)

Two granite blocks, 3 meter (10 ft) high and 5 ton in weight, enclose a
slit of 3 cm wide (1.2"). It can pass a thin line of sunlight. When the sun
is due south, at local noon, the light hits the center line of the tile
plateau.
A small rod connects the two blocks, just below the top. It causes a break
in the line of light. This break serves as a marker which indicates the
date along the meridian line. The dates of the national holidays of the
member states of the European Union are marked by crosslines and identified
by the
national flags.

Willy Leenders
Hasselt, Flanders, belgium
50.9 N   5.4 E



Tom Egan wrote:

> I'm looking for examples of dials that will illuminate a particular spot
> on the dial only on the date (and time of day, preferably) to be
> commemorated.  I recall running across links to tube-based dials in the
> past, but apparently didn't file them away.
>
> Can anyone point me to such dials?  I want to show examples to a group
> of which I am a member.  If they are intrigued by it, the members might
> want to commission a dial.
>
> This request is not limited to tubes.  Any clever idea is welcome.
>
> You may respond to me off-line if you wish at [EMAIL PROTECTED]
>
> Thanks.
> Tom Egan
> Costa Mesa California
>
> -

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Anniversary-of-a-date dial

[Tom Egan]

on the dial only on the date (and time of day, preferably) to be 
commemorated.  I recall running across links to tube-based dials in the 
past, but apparently didn't file them away.


Can anyone point me to such dials?  I want to show examples to a group 
of which I am a member.  If they are intrigued by it, the members might 
want to commission a dial.


This request is not limited to tubes.  Any clever idea is welcome.

You may respond to me off-line if you wish at [EMAIL PROTECTED]

Thanks.
Tom Egan
Costa Mesa California



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