Re: Sunsweep sculpture

2016-08-16 Thread Roger Bailey 

Hi Steve,

Good spotting! Thanks for the posting. I am pleased to see the sculptor 
donated these pieces over 30 years ago. I would not want to pay for them 
through a government grant. They are simple granite slabs aligned east west 
swooping up east to west on the east coast, two triangle  mid continent and 
curved west to east on the west coast. Yes, the sun rises in the east and 
sets in the west, duh!
Here are pictures of the other locations. 
http://scenethroughmyeyes.blogspot.ca/2014/03/sunsweep.html


Regards, Roger Bailey

--
From: "Steve Lelievre" 
Sent: Tuesday, August 16, 2016 5:18 PM
To: "Sundial Group" 
Subject: Sunsweep sculpture


Hello,

Has anyone encountered the set of sculptures called Sunsweep by David 
Barr? It consists of three pieces at sites along the Canada-USA border 
(Campobello NB, Point Roberts WA, Lake of the Woods, MI) and together they 
are meant to represent a conceptual arch symbolizing friendship between 
the two nations. The 3 sites are geographically interesting - they are 
reachable by land from the main part of their respective countries only by 
travelling through the other country (pene-enclaves).


I was recently at Point Roberts and saw the piece located there.. There is 
a plaque indicating that the piece is aligned to the North Star, the 
equinoxes and the solstices. I found that the plane of the slab forming 
the sculpture is aligned East-West but I could not see anything that 
matches the other directions mentioned. Am I missing something? Perhaps 
the shape causes a special shadow on the special dates?


You can find photos on the Web, for example at
http://2.bp.blogspot.com/-t9hlFDU5te0/UzWerhh1YLI/mQg/7gPHFqa8TFw/s1600/Pt+Roberts+Sunsweep.JPG

The outer (upper) curved edge has a curious V profile, with the point of 
the V switching from one side of the slab to the other as it progresses 
over the length of the curve.  The inner or lower curved edge appears to 
be perpendicular to the plan of the slab.  I could not see any markings on 
the ground. To me, placement of the ring of stones around the base appears 
insignificant.


Any thoughts?

Steve




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RE: Sunsweep sculpture

2016-08-16 Thread Dave Bell 
So, this is the western-most piece of the "arch". Sad that it appears to
have been broken.

Well, if the plane of the arch is oriented E-W, and it's vertical, as it
appears tobe, then the normal to the plane faces North, though no to
Polaris. He equinoctial; sunrises and sunsets would also be due East and
West, so in the plane of the slab.

Dave

-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Steve
Lelievre
Sent: Tuesday, August 16, 2016 5:19 PM
To: Sundial Group 
Subject: Sunsweep sculpture

Hello,

Has anyone encountered the set of sculptures called Sunsweep by David Barr?
It consists of three pieces at sites along the Canada-USA border (Campobello
NB, Point Roberts WA, Lake of the Woods, MI) and together they are meant to
represent a conceptual arch symbolizing friendship between the two nations.
The 3 sites are geographically interesting - they are reachable by land from
the main part of their respective countries only by travelling through the
other country (pene-enclaves).

I was recently at Point Roberts and saw the piece located there.. There is a
plaque indicating that the piece is aligned to the North Star, the equinoxes
and the solstices. I found that the plane of the slab forming the sculpture
is aligned East-West but I could not see anything that matches the other
directions mentioned. Am I missing something? Perhaps the shape causes a
special shadow on the special dates?

You can find photos on the Web, for example at
http://2.bp.blogspot.com/-t9hlFDU5te0/UzWerhh1YLI/mQg/7gPHFqa8TFw/s1
600/Pt+Roberts+Sunsweep.JPG

The outer (upper) curved edge has a curious V profile, with the point of the
V switching from one side of the slab to the other as it progresses over the
length of the curve.  The inner or lower curved edge appears to be
perpendicular to the plan of the slab.  I could not see any markings on the
ground. To me, placement of the ring of stones around the base appears
insignificant.

Any thoughts?

Steve




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Sunsweep sculpture

2016-08-16 Thread Steve Lelievre 

Hello,

Has anyone encountered the set of sculptures called Sunsweep by David 
Barr? It consists of three pieces at sites along the Canada-USA border 
(Campobello NB, Point Roberts WA, Lake of the Woods, MI) and together 
they are meant to represent a conceptual arch symbolizing friendship 
between the two nations. The 3 sites are geographically interesting - 
they are reachable by land from the main part of their respective 
countries only by travelling through the other country (pene-enclaves).


I was recently at Point Roberts and saw the piece located there.. There 
is a plaque indicating that the piece is aligned to the North Star, the 
equinoxes and the solstices. I found that the plane of the slab forming 
the sculpture is aligned East-West but I could not see anything that 
matches the other directions mentioned. Am I missing something? Perhaps 
the shape causes a special shadow on the special dates?


You can find photos on the Web, for example at
http://2.bp.blogspot.com/-t9hlFDU5te0/UzWerhh1YLI/mQg/7gPHFqa8TFw/s1600/Pt+Roberts+Sunsweep.JPG

The outer (upper) curved edge has a curious V profile, with the point of 
the V switching from one side of the slab to the other as it progresses 
over the length of the curve.  The inner or lower curved edge appears to 
be perpendicular to the plan of the slab.  I could not see any markings 
on the ground. To me, placement of the ring of stones around the base 
appears insignificant.


Any thoughts?

Steve




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Re: Double analemma dials

2016-08-16 Thread Fred Sawyer 
Hi Fabio

This use of an analemma design on the analemmatic dial has been a confusing
error that goes back at least to the early 20th century introduction of the
curve on the dial in Brou, France.  The use of a double analemma design
with curves calculated to limit error to just a few minutes throughout the
year goes back at least to 1970 and the work of Ken Seidelman at Longwood
Gardens in Pennsylvania.  For a detailed discussion with equations, etc.
see my article "Of Analemmas, Mean Time and the Analemmatic Sundial" that
you can download at https://dl.dropboxusercontent.com/u/4837615/scia7.pdf
Brian Albinson has taken this idea to heart and, using a slightly different
approach to the equations, has designed several such dials in the Vancouver
area.

Fred Sawyer

On Tue, Aug 16, 2016 at 12:23 PM, fabio.savian 
wrote:

>
> hi all,
>
> I draw inspiration from the image sent by Brian Albison for a meditation.
>
> I often found analemmatic sundials with the analemma. Has it a sense ?
>
> Standing on the analemma one can get the right correction for eot only at
> noon.
> Most of these sundials don't report a warning about it, so the users get a
> wrong time al the day, except noon.
> Moreover some of them haven't the calendar on the meridian line but only
> on the analemma, so the misunderstanding is sure.
>
> The use of a table with the eot should solve the curiosity to get the mean
> time, so I wonder why this kind of sundial is knowspreading with the
> analemma while it is not suitable for this.
> Do you  where this use come from ?
>
> ciao Fabio
>
> Fabio Savian
>
> Inviato da Tablet Samsung.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>  Messaggio originale 
> Da: Brian Albinson 
> Data: 16/08/2016 18:04 (GMT+02:00)
> A: Sundial Group 
> Oggetto: Double analemma dials
>
> Hi folk
>
> We have built 3 direct reading mean time double analemma dials,
> (including the Highlands School dial) in the Vancouver area and are
> curious to know if any others exist in the world (apart from the
> Longwood dial).
>
> Brian Albinson
>
> Len Berggren
>
> Vancouver, Canada
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
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Re: R: Double analemma dials

2016-08-16 Thread Willy Leenders 


Fabio,

The misconception you justifiably complained was already in use when sundial 
illiterates added a analemma loop to the oldest known analemmatic sundial in 
Bourg-en-Bresse (France) at the monastery of Brou.


Willy Leenders
Hasselt in Flanders (Belgium)

Visit my website about the sundials in the province of Limburg (Flanders) with 
a section 'worth knowing about sundials' (mostly in Dutch): 
http://www.wijzerweb.be


Op 16-aug-2016, om 18:23 heeft fabio.savian het volgende geschreven:

> 
> hi all,
> 
> I draw inspiration from the image sent by Brian Albison for a meditation.
> 
> I often found analemmatic sundials with the analemma. Has it a sense ?
> 
> Standing on the analemma one can get the right correction for eot only at 
> noon.
> Most of these sundials don't report a warning about it, so the users get a 
> wrong time al the day, except noon.
> Moreover some of them haven't the calendar on the meridian line but only on 
> the analemma, so the misunderstanding is sure.
> 
> The use of a table with the eot should solve the curiosity to get the mean 
> time, so I wonder why this kind of sundial is knowspreading with the analemma 
> while it is not suitable for this.
> Do you  where this use come from ?
> 
> ciao Fabio
> 
> Fabio Savian
> 
> Inviato da Tablet Samsung.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>  Messaggio originale 
> Da: Brian Albinson  
> Data: 16/08/2016 18:04 (GMT+02:00) 
> A: Sundial Group  
> Oggetto: Double analemma dials 
> 
> Hi folk
> 
> We have built 3 direct reading mean time double analemma dials, 
> (including the Highlands School dial) in the Vancouver area and are 
> curious to know if any others exist in the world (apart from the 
> Longwood dial).
> 
> Brian Albinson
> 
> Len Berggren
> 
> Vancouver, Canada
> 
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
> 

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R: Double analemma dials

2016-08-16 Thread fabio.savian 

hi all,

I draw inspiration from the image sent by Brian Albison for a meditation.

I often found analemmatic sundials with the analemma. Has it a sense ?

Standing on the analemma one can get the right correction for eot only at noon.
Most of these sundials don't report a warning about it, so the users get a 
wrong time al the day, except noon.
Moreover some of them haven't the calendar on the meridian line but only on the 
analemma, so the misunderstanding is sure.

The use of a table with the eot should solve the curiosity to get the mean 
time, so I wonder why this kind of sundial is knowspreading with the analemma 
while it is not suitable for this.
Do you  where this use come from ?

ciao Fabio

Fabio Savian

Inviato da Tablet Samsung.


































 Messaggio originale 
Da: Brian Albinson  
Data: 16/08/2016  18:04  (GMT+02:00) 
A: Sundial Group  
Oggetto: Double analemma dials 

Hi folk

We have built 3 direct reading mean time double analemma dials, 
(including the Highlands School dial) in the Vancouver area and are 
curious to know if any others exist in the world (apart from the 
Longwood dial).

Brian Albinson

Len Berggren

Vancouver, Canada


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