Re: Adjusting dial to new location

2023-04-02 Thread Michael Ossipoff
Tipping the dial-plate for latitude makes it exactly as if the dial were at
the latitude it was made for. No need for a 2nd wedge. If the new longitude
differs from the old on, then just adjust your longitude correction
constant. + 4 minutes for every degree more west of your standard meridian.

On Sun, Apr 2, 2023 at 17:20 Rod Wall  wrote:

> Hi Jack and Steve,
>
> To implement what Jack has indicated. You could have two wedges one on top
> of each other. One for Latitude correction and one for Longitude correction.
>
> You could also just use a Longitude correction wedge if you only wanted to
> correct for Longitude.
>
> When writing instructions. Please also include people who live in the
> southern hemisphere, we do also have sundials.
>
> Do I have this correct?
>
> Roderick.
>
> On 3/04/2023 9:24 am, Steve Lelievre wrote:
>
> Jack,
>
> Try out my calculator! You can specify a time zone meridian for the dial
> at its original location, or at its new location, or both. If there is an
> effective longitude change, it'll tell you how to position (twist) the dial
> on the wedge and how to orient the wedge itself, turning it away (rotating
> it ) from the meridian line.
>
> Steve
>
>
> On 2023-04-02 3:59 p.m., Jack Aubert wrote:
>
> I thought about this briefly.  I had always thought that the purpose of
> the shim or wedge adjustment was to tip the dial north or south so that
> dial is at the latitude it was originally designed for.  If the original
> dial has a built-in longitude correction, that could also be factored into
> a wedge which would have both a north-south and east-west axis.  But a
> wedge would not work if it moved the gnomon out of alignment with the with
> the rotation of the earth (or the celestial sphere).  I think a
> longitudinal adjustment would only work if he original dial had a time-zone
> offset included by rotating the hour lines with respect to the origin of
> the gnomon.
>
>
>
> Does this make sense?  It sounds like a good project for a 3-D printer.
>
>
>
> Jack
>
>
>
> *From:* sundial 
>  *On Behalf Of *Steve Lelievre
> *Sent:* Sunday, April 2, 2023 5:16 PM
> *To:* Michael Ossipoff  
> *Cc:* Sundial List  
> *Subject:* Re: Adjusting dial to new location
>
>
>
> Michael,
>
> Yes, I recognize that to get Mean Time involves Equation of Time
> adjustment and that Equation of Longitude can be handled there to give
> Standard Time (or DST).
>
> But anyway, my inquiry was to seek an online wedge calculator. Nobody
> identified one and  a week seemed an adequate wait for responses, so I've
> just written one.  Anyone who's interested, please see
>
>
> https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude
>
> Cheers,
>
> Steve
>
>
>
> On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:
>
> I just want to mention that the shim under the north or south edge of the
> dial is only for latitude. Longitude is corrected-for by changing the
> constant term of the Sundial-Time to Clock-Time conversion.
>
>
>
> But usually Sundial-Time, Local True Solar Time, is what I’d want from a
> sundial.
>
>
>
> On Sun, Mar 26, 2023 at 14:30 Steve Lelievre <
> steve.lelievre.can...@gmail.com> wrote:
>
> Hi,
>
> Can anyone point me to an existing online calculator for making a wedge
> to adjust a horizontal dial to a new latitude and longitude?
>
> I am not asking for an explanation of how to do the calculation; I just
> want to be able to point people to a calculator that has already been
> proved on the internet. It should use the original location (latitude
> and longitude) and the new location to calculate the angle of slope of
> the wedge and the required rotation from the meridian.
>
> Many thanks,
>
> Steve
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
> ---https://lists.uni-koeln.de/mailman/listinfo/sundial
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread koolish

I tried the app. I used 40, -75 and 45, -70. It just said to use a 5
degree wedge and said nothing about a longitude correction. 


I communicated to Steve privately last week. I said that a longitude
correction was a rotation around the gnomon. Does anybody else believe
this? One of the books, I can't remember which, calls this The Universal
Sundial Principle. It says that two dials with the same orientation in
space with respect to the sun will read the same time, regardless of
where on earth they are. 


---

On 2023-04-02 19:24, Steve Lelievre wrote:

Jack, 

Try out my calculator! You can specify a time zone meridian for the dial at its original location, or at its new location, or both. If there is an effective longitude change, it'll tell you how to position (twist) the dial on the wedge and how to orient the wedge itself, turning it away (rotating it ) from the meridian line. 

Steve 

On 2023-04-02 3:59 p.m., Jack Aubert wrote: 

I thought about this briefly.  I had always thought that the purpose of the shim or wedge adjustment was to tip the dial north or south so that dial is at the latitude it was originally designed for.  If the original dial has a built-in longitude correction, that could also be factored into a wedge which would have both a north-south and east-west axis.  But a wedge would not work if it moved the gnomon out of alignment with the with the rotation of the earth (or the celestial sphere).  I think a longitudinal adjustment would only work if he original dial had a time-zone offset included by rotating the hour lines with respect to the origin of the gnomon.  

Does this make sense?  It sounds like a good project for a 3-D printer.

Jack 


From: sundial  On Behalf Of Steve Lelievre
Sent: Sunday, April 2, 2023 5:16 PM
To: Michael Ossipoff 
Cc: Sundial List 
Subject: Re: Adjusting dial to new location 

Michael, 

Yes, I recognize that to get Mean Time involves Equation of Time adjustment and that Equation of Longitude can be handled there to give Standard Time (or DST). 

But anyway, my inquiry was to seek an online wedge calculator. Nobody identified one and  a week seemed an adequate wait for responses, so I've just written one.  Anyone who's interested, please see 

https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude 

Cheers, 

Steve 

On 2023-04-02 1:41 p.m., Michael Ossipoff wrote: 

I just want to mention that the shim under the north or south edge of the dial is only for latitude. Longitude is corrected-for by changing the constant term of the Sundial-Time to Clock-Time conversion. 

But usually Sundial-Time, Local True Solar Time, is what I'd want from a sundial. 

On Sun, Mar 26, 2023 at 14:30 Steve Lelievre  wrote: 


Hi,

Can anyone point me to an existing online calculator for making a wedge 
to adjust a horizontal dial to a new latitude and longitude?


I am not asking for an explanation of how to do the calculation; I just 
want to be able to point people to a calculator that has already been 
proved on the internet. It should use the original location (latitude 
and longitude) and the new location to calculate the angle of slope of 
the wedge and the required rotation from the meridian.


Many thanks,

Steve

---
https://lists.uni-koeln.de/mailman/listinfo/sundial


---
https://lists.uni-koeln.de/mailman/listinfo/sundial---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Sundial in walking stick

2023-04-02 Thread Peter Mayer

Hi Patrick,

Thanks for the link. It certainly seems similar, if slightly different, 
from what I take to be the Indian 'knockoff' that you've found. Perhaps 
we should all get one...for future use!


It does seem evident that these are all made for the higher latitudes in 
the Northern Hemisphere. So I tried to imagine using it horizontally as 
a vertical dial for Down Under.


I'll let you know what it went for after the auction tomorrow.

best wishes,

Peter

On 3/04/2023 2:00:33, Patrick Vyvyan wrote:

*
CAUTION: External email. Only click on links or open attachments from 
trusted senders.

*

Rather curious to know what it makes finally, from what I can see it 
looks to be a modern novelty very similar to this one currently out of 
stock on the Internet 
https://www.alibaba.com/product-detail/Vintage-Brass-and-Wood-Sundial-Compass_1006081836.html 



Best wishes to all, Patrick Vyvyan

On Sun, 2 Apr 2023 at 06:41, Peter Mayer  wrote:

Hi,

This walking stick with sundial, compass (and flask) is coming up
for sale at an Adelaide auction house. Bids are already above
their modest estimate of sale price.


best wishes,

Peter

-- 
---

Peter Mayer
Department of Politics & International Relations (POLIR)
School of Social Sciences
http://www.arts.adelaide.edu.au/polis/
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8313 5609
Fax : +61 8 8313 3443
e-mail:peter.ma...@adelaide.edu.au
CRICOS Provider Number 00123M
---

This email message is intended only for the addressee(s)
and contains information that may be confidential
and/or copyright. If you are not the intended recipient
please notify the sender by reply email
and immediately delete this email.
Use, disclosure or reproduction of this email by anyone
other than the intended recipient(s) is strictly prohibited.
No representation is made that this email or any attachment
are free of viruses. Virus scanning is recommended and is the
responsibility of the recipient.
--
https://www.adelaide.edu.au/study/

---
https://lists.uni-koeln.de/mailman/listinfo/sundial



--
---
Peter Mayer
Department of Politics & International Relations (POLIR)
School of Social Sciences
http://www.arts.adelaide.edu.au/polis/
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8313 5609
Fax : +61 8 8313 3443
e-mail:peter.ma...@adelaide.edu.au
CRICOS Provider Number 00123M
---

This email message is intended only for the addressee(s)
and contains information that may be confidential
and/or copyright. If you are not the intended recipient
please notify the sender by reply email
and immediately delete this email.
Use, disclosure or reproduction of this email by anyone
other than the intended recipient(s) is strictly prohibited.
No representation is made that this email or any attachment
are free of viruses. Virus scanning is recommended and is the
responsibility of the recipient.
--
https://www.adelaide.edu.au/study/
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread Steve Lelievre
You don’t need two wedges, you just skew the positioning to do both
adjustments in one.

If you have The Compendium vol 7 issue 1, take a look at the articles by
Fred Sawyer and Bill Gottesman.

Steve

On Sun, Apr 2, 2023 at 17:20, Rod Wall  wrote:

> Hi Jack and Steve,
>
> To implement what Jack has indicated. You could have two wedges one on top
> of each other. One for Latitude correction and one for Longitude correction.
>
> You could also just use a Longitude correction wedge if you only wanted to
> correct for Longitude.
>
> When writing instructions. Please also include people who live in the
> southern hemisphere, we do also have sundials.
>
> Do I have this correct?
>
> Roderick.
>
> On 3/04/2023 9:24 am, Steve Lelievre wrote:
>
> Jack,
>
> Try out my calculator! You can specify a time zone meridian for the dial
> at its original location, or at its new location, or both. If there is an
> effective longitude change, it'll tell you how to position (twist) the dial
> on the wedge and how to orient the wedge itself, turning it away (rotating
> it ) from the meridian line.
>
> Steve
>
>
> On 2023-04-02 3:59 p.m., Jack Aubert wrote:
>
> I thought about this briefly.  I had always thought that the purpose of
> the shim or wedge adjustment was to tip the dial north or south so that
> dial is at the latitude it was originally designed for.  If the original
> dial has a built-in longitude correction, that could also be factored into
> a wedge which would have both a north-south and east-west axis.  But a
> wedge would not work if it moved the gnomon out of alignment with the with
> the rotation of the earth (or the celestial sphere).  I think a
> longitudinal adjustment would only work if he original dial had a time-zone
> offset included by rotating the hour lines with respect to the origin of
> the gnomon.
>
>
>
> Does this make sense?  It sounds like a good project for a 3-D printer.
>
>
>
> Jack
>
>
>
> *From:* sundial 
>  *On Behalf Of *Steve Lelievre
> *Sent:* Sunday, April 2, 2023 5:16 PM
> *To:* Michael Ossipoff  
> *Cc:* Sundial List  
> *Subject:* Re: Adjusting dial to new location
>
>
>
> Michael,
>
> Yes, I recognize that to get Mean Time involves Equation of Time
> adjustment and that Equation of Longitude can be handled there to give
> Standard Time (or DST).
>
> But anyway, my inquiry was to seek an online wedge calculator. Nobody
> identified one and  a week seemed an adequate wait for responses, so I've
> just written one.  Anyone who's interested, please see
>
>
> https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude
>
> Cheers,
>
> Steve
>
>
>
> On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:
>
> I just want to mention that the shim under the north or south edge of the
> dial is only for latitude. Longitude is corrected-for by changing the
> constant term of the Sundial-Time to Clock-Time conversion.
>
>
>
> But usually Sundial-Time, Local True Solar Time, is what I’d want from a
> sundial.
>
>
>
> On Sun, Mar 26, 2023 at 14:30 Steve Lelievre <
> steve.lelievre.can...@gmail.com> wrote:
>
> Hi,
>
> Can anyone point me to an existing online calculator for making a wedge
> to adjust a horizontal dial to a new latitude and longitude?
>
> I am not asking for an explanation of how to do the calculation; I just
> want to be able to point people to a calculator that has already been
> proved on the internet. It should use the original location (latitude
> and longitude) and the new location to calculate the angle of slope of
> the wedge and the required rotation from the meridian.
>
> Many thanks,
>
> Steve
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
> ---https://lists.uni-koeln.de/mailman/listinfo/sundial
>
> --
Cell +1 778 837 5771
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread Rod Wall

Hi Jack and Steve,

To implement what Jack has indicated. You could have two wedges one on 
top of each other. One for Latitude correction and one for Longitude 
correction.


You could also just use a Longitude correction wedge if you only wanted 
to correct for Longitude.


When writing instructions. Please also include people who live in the 
southern hemisphere, we do also have sundials.


Do I have this correct?

Roderick.

On 3/04/2023 9:24 am, Steve Lelievre wrote:


Jack,

Try out my calculator! You can specify a time zone meridian for the 
dial at its original location, or at its new location, or both. If 
there is an effective longitude change, it'll tell you how to position 
(twist) the dial on the wedge and how to orient the wedge itself, 
turning it away (rotating it ) from the meridian line.


Steve


On 2023-04-02 3:59 p.m., Jack Aubert wrote:


I thought about this briefly.  I had always thought that the purpose 
of the shim or wedge adjustment was to tip the dial north or south so 
that dial is at the latitude it was originally designed for.  If the 
original dial has a built-in longitude correction, that could also be 
factored into a wedge which would have both a north-south and 
east-west axis.  But a wedge would not work if it moved the gnomon 
out of alignment with the with the rotation of the earth (or the 
celestial sphere).  I think a longitudinal adjustment would only work 
if he original dial had a time-zone offset included by rotating the 
hour lines with respect to the origin of the gnomon.


Does this make sense?  It sounds like a good project for a 3-D printer.

Jack

*From:* sundial  *On Behalf Of *Steve 
Lelievre

*Sent:* Sunday, April 2, 2023 5:16 PM
*To:* Michael Ossipoff 
*Cc:* Sundial List 
*Subject:* Re: Adjusting dial to new location

Michael,

Yes, I recognize that to get Mean Time involves Equation of Time 
adjustment and that Equation of Longitude can be handled there to 
give Standard Time (or DST).


But anyway, my inquiry was to seek an online wedge calculator. Nobody 
identified one and  a week seemed an adequate wait for responses, so 
I've just written one. Anyone who's interested, please see


https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude

Cheers,

Steve

On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:

I just want to mention that the shim under the north or south
edge of the dial is only for latitude. Longitude is corrected-for
by changing the constant term of the Sundial-Time to Clock-Time
conversion.

But usually Sundial-Time, Local True Solar Time, is what I’d want
from a sundial.

On Sun, Mar 26, 2023 at 14:30 Steve Lelievre
 wrote:

Hi,

Can anyone point me to an existing online calculator for
making a wedge
to adjust a horizontal dial to a new latitude and longitude?

I am not asking for an explanation of how to do the
calculation; I just
want to be able to point people to a calculator that has
already been
proved on the internet. It should use the original location
(latitude
and longitude) and the new location to calculate the angle of
slope of
the wedge and the required rotation from the meridian.

Many thanks,

Steve


---
https://lists.uni-koeln.de/mailman/listinfo/sundial



---
https://lists.uni-koeln.de/mailman/listinfo/sundial
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: RE: Adjusting dial to new location

2023-04-02 Thread Steve Lelievre

Jack,

Try out my calculator! You can specify a time zone meridian for the dial 
at its original location, or at its new location, or both. If there is 
an effective longitude change, it'll tell you how to position (twist) 
the dial on the wedge and how to orient the wedge itself, turning it 
away (rotating it ) from the meridian line.


Steve


On 2023-04-02 3:59 p.m., Jack Aubert wrote:


I thought about this briefly.  I had always thought that the purpose 
of the shim or wedge adjustment was to tip the dial north or south so 
that dial is at the latitude it was originally designed for.  If the 
original dial has a built-in longitude correction, that could also be 
factored into a wedge which would have both a north-south and 
east-west axis.  But a wedge would not work if it moved the gnomon out 
of alignment with the with the rotation of the earth (or the celestial 
sphere).  I think a longitudinal adjustment would only work if he 
original dial had a time-zone offset included by rotating the hour 
lines with respect to the origin of the gnomon.


Does this make sense?  It sounds like a good project for a 3-D printer.

Jack

*From:* sundial  *On Behalf Of *Steve 
Lelievre

*Sent:* Sunday, April 2, 2023 5:16 PM
*To:* Michael Ossipoff 
*Cc:* Sundial List 
*Subject:* Re: Adjusting dial to new location

Michael,

Yes, I recognize that to get Mean Time involves Equation of Time 
adjustment and that Equation of Longitude can be handled there to give 
Standard Time (or DST).


But anyway, my inquiry was to seek an online wedge calculator. Nobody 
identified one and  a week seemed an adequate wait for responses, so 
I've just written one.  Anyone who's interested, please see


https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude

Cheers,

Steve

On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:

I just want to mention that the shim under the north or south edge
of the dial is only for latitude. Longitude is corrected-for by
changing the constant term of the Sundial-Time to Clock-Time
conversion.

But usually Sundial-Time, Local True Solar Time, is what I’d want
from a sundial.

On Sun, Mar 26, 2023 at 14:30 Steve Lelievre
 wrote:

Hi,

Can anyone point me to an existing online calculator for
making a wedge
to adjust a horizontal dial to a new latitude and longitude?

I am not asking for an explanation of how to do the
calculation; I just
want to be able to point people to a calculator that has
already been
proved on the internet. It should use the original location
(latitude
and longitude) and the new location to calculate the angle of
slope of
the wedge and the required rotation from the meridian.

Many thanks,

Steve


---
https://lists.uni-koeln.de/mailman/listinfo/sundial
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



RE: Adjusting dial to new location

2023-04-02 Thread Jack Aubert via sundial
Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die
eigentliche Nachricht steht dadurch in einem Anhang.

This message was wrapped to be DMARC compliant. The actual message
text is therefore in an attachment.--- Begin Message ---
I thought about this briefly.  I had always thought that the purpose of the 
shim or wedge adjustment was to tip the dial north or south so that dial is at 
the latitude it was originally designed for.  If the original dial has a 
built-in longitude correction, that could also be factored into a wedge which 
would have both a north-south and east-west axis.  But a wedge would not work 
if it moved the gnomon out of alignment with the with the rotation of the earth 
(or the celestial sphere).  I think a longitudinal adjustment would only work 
if he original dial had a time-zone offset included by rotating the hour lines 
with respect to the origin of the gnomon.  

 

Does this make sense?  It sounds like a good project for a 3-D printer.   

 

Jack

 

From: sundial  On Behalf Of Steve Lelievre
Sent: Sunday, April 2, 2023 5:16 PM
To: Michael Ossipoff 
Cc: Sundial List 
Subject: Re: Adjusting dial to new location

 

Michael,

Yes, I recognize that to get Mean Time involves Equation of Time adjustment and 
that Equation of Longitude can be handled there to give Standard Time (or DST).

But anyway, my inquiry was to seek an online wedge calculator. Nobody 
identified one and  a week seemed an adequate wait for responses, so I've just 
written one.  Anyone who's interested, please see

https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude

Cheers,

Steve

 

On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:

I just want to mention that the shim under the north or south edge of the dial 
is only for latitude. Longitude is corrected-for by changing the constant term 
of the Sundial-Time to Clock-Time conversion.

 

But usually Sundial-Time, Local True Solar Time, is what I’d want from a 
sundial.

 

On Sun, Mar 26, 2023 at 14:30 Steve Lelievre mailto:steve.lelievre.can...@gmail.com> > wrote:

Hi,

Can anyone point me to an existing online calculator for making a wedge 
to adjust a horizontal dial to a new latitude and longitude?

I am not asking for an explanation of how to do the calculation; I just 
want to be able to point people to a calculator that has already been 
proved on the internet. It should use the original location (latitude 
and longitude) and the new location to calculate the angle of slope of 
the wedge and the required rotation from the meridian.

Many thanks,

Steve


---
https://lists.uni-koeln.de/mailman/listinfo/sundial

--- End Message ---
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread Michael Ossipoff
...& thank you for doing so, because online calculators & dial-printing
programs make sundials readily accessible to everyone.

On Sun, Apr 2, 2023 at 5:15 PM Steve Lelievre <
steve.lelievre.can...@gmail.com> wrote:

> Michael,
>
> Yes, I recognize that to get Mean Time involves Equation of Time
> adjustment and that Equation of Longitude can be handled there to give
> Standard Time (or DST).
>
> But anyway, my inquiry was to seek an online wedge calculator. Nobody
> identified one and  a week seemed an adequate wait for responses, so I've
> just written one.  Anyone who's interested, please see
>
>
> https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude
>
> Cheers,
>
> Steve
>
> On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:
>
> I just want to mention that the shim under the north or south edge of the
> dial is only for latitude. Longitude is corrected-for by changing the
> constant term of the Sundial-Time to Clock-Time conversion.
>
> But usually Sundial-Time, Local True Solar Time, is what I’d want from a
> sundial.
>
> On Sun, Mar 26, 2023 at 14:30 Steve Lelievre <
> steve.lelievre.can...@gmail.com> wrote:
>
>> Hi,
>>
>> Can anyone point me to an existing online calculator for making a wedge
>> to adjust a horizontal dial to a new latitude and longitude?
>>
>> I am not asking for an explanation of how to do the calculation; I just
>> want to be able to point people to a calculator that has already been
>> proved on the internet. It should use the original location (latitude
>> and longitude) and the new location to calculate the angle of slope of
>> the wedge and the required rotation from the meridian.
>>
>> Many thanks,
>>
>> Steve
>>
>>
>> ---
>> https://lists.uni-koeln.de/mailman/listinfo/sundial
>>
>>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread Steve Lelievre

Michael,

Yes, I recognize that to get Mean Time involves Equation of Time 
adjustment and that Equation of Longitude can be handled there to give 
Standard Time (or DST).


But anyway, my inquiry was to seek an online wedge calculator. Nobody 
identified one and  a week seemed an adequate wait for responses, so 
I've just written one.  Anyone who's interested, please see


https://sundials.org/index.php/teachers-corner/sundial-construction/367-easy-dial-adjustment-for-your-latitude

Cheers,

Steve


On 2023-04-02 1:41 p.m., Michael Ossipoff wrote:
I just want to mention that the shim under the north or south edge of 
the dial is only for latitude. Longitude is corrected-for by changing 
the constant term of the Sundial-Time to Clock-Time conversion.


But usually Sundial-Time, Local True Solar Time, is what I’d want from 
a sundial.


On Sun, Mar 26, 2023 at 14:30 Steve Lelievre 
 wrote:


Hi,

Can anyone point me to an existing online calculator for making a
wedge
to adjust a horizontal dial to a new latitude and longitude?

I am not asking for an explanation of how to do the calculation; I
just
want to be able to point people to a calculator that has already been
proved on the internet. It should use the original location (latitude
and longitude) and the new location to calculate the angle of
slope of
the wedge and the required rotation from the meridian.

Many thanks,

Steve


---
https://lists.uni-koeln.de/mailman/listinfo/sundial
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Adjusting dial to new location

2023-04-02 Thread Michael Ossipoff
I just want to mention that the shim under the north or south edge of the
dial is only for latitude. Longitude is corrected-for by changing the
constant term of the Sundial-Time to Clock-Time conversion.

But usually Sundial-Time, Local True Solar Time, is what I’d want from a
sundial.

On Sun, Mar 26, 2023 at 14:30 Steve Lelievre <
steve.lelievre.can...@gmail.com> wrote:

> Hi,
>
> Can anyone point me to an existing online calculator for making a wedge
> to adjust a horizontal dial to a new latitude and longitude?
>
> I am not asking for an explanation of how to do the calculation; I just
> want to be able to point people to a calculator that has already been
> proved on the internet. It should use the original location (latitude
> and longitude) and the new location to calculate the angle of slope of
> the wedge and the required rotation from the meridian.
>
> Many thanks,
>
> Steve
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Re: Sundial in walking stick

2023-04-02 Thread Patrick Vyvyan
Rather curious to know what it makes finally, from what I can see it looks
to be a modern novelty very similar to this one currently out of stock on
the Internet
https://www.alibaba.com/product-detail/Vintage-Brass-and-Wood-Sundial-Compass_1006081836.html

Best wishes to all, Patrick Vyvyan

On Sun, 2 Apr 2023 at 06:41, Peter Mayer  wrote:

> Hi,
>
> This walking stick with sundial, compass (and flask) is coming up for sale
> at an Adelaide auction house. Bids are already above their modest estimate
> of sale price.
>
>
> best wishes,
>
> Peter
>
> --
> ---
> Peter Mayer
> Department of Politics & International Relations (POLIR)
> School of Social Scienceshttp://www.arts.adelaide.edu.au/polis/
> The University of Adelaide, AUSTRALIA 5005
> Ph : +61 8 8313 5609
> Fax : +61 8 8313 3443
> e-mail: peter.ma...@adelaide.edu.au
> CRICOS Provider Number 00123M
> ---
>
> This email message is intended only for the addressee(s)
> and contains information that may be confidential
> and/or copyright. If you are not the intended recipient
> please notify the sender by reply email
> and immediately delete this email.
> Use, disclosure or reproduction of this email by anyone
> other than the intended recipient(s) is strictly prohibited.
> No representation is made that this email or any attachment
> are free of viruses. Virus scanning is recommended and is the
> responsibility of the recipient.
> --https://www.adelaide.edu.au/study/
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial



Sundial in walking stick

2023-04-02 Thread Peter Mayer

Hi,

This walking stick with sundial, compass (and flask) is coming up for 
sale at an Adelaide auction house. Bids are already above their modest 
estimate of sale price.



best wishes,

Peter

--
---
Peter Mayer
Department of Politics & International Relations (POLIR)
School of Social Sciences
http://www.arts.adelaide.edu.au/polis/
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8313 5609
Fax : +61 8 8313 3443
e-mail:peter.ma...@adelaide.edu.au
CRICOS Provider Number 00123M
---

This email message is intended only for the addressee(s)
and contains information that may be confidential
and/or copyright. If you are not the intended recipient
please notify the sender by reply email
and immediately delete this email.
Use, disclosure or reproduction of this email by anyone
other than the intended recipient(s) is strictly prohibited.
No representation is made that this email or any attachment
are free of viruses. Virus scanning is recommended and is the
responsibility of the recipient.
--
https://www.adelaide.edu.au/study/
---
https://lists.uni-koeln.de/mailman/listinfo/sundial