Longcase Clock with Equation of TIme

[Miguel A. Garcia]

Hi All

How about this watch.

http://www.yeswatch.com/wrist-watch/timekeeper/zulu.html

Miguel A. G. Arrando





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virus.
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Re: Longcase Clock with Equation of TIme

[rodwall1...@gmail.com]

Hi Ian,
Thanks, never thought about smartwatch applications. Looks like I'll have to 
purchase a smartwatch for me to have a watch with the equation of time. But 
I'll have to wait until someone produces a application with a dial that has the 
EOT.

I notice that one of the android smartwatch application producers will add your 
watch if you tell them what it is. Maybe we should ask them to do one of the 
$30,000 EOT watches. That would be a lot cheaper.

Thanks,

Regards,

Roderick Wall.

- Reply message -
From: "Ian Maddocks" <ian_maddo...@hotmail.com>
To: "Willy Leenders" <willy.leend...@telenet.be>, "Sundial list" 
<sundial@uni-koeln.de>
Subject: Longcase Clock with Equation of TIme
Date: Sun, Oct 9, 2016 7:40 AM

hi Willy


As is the answer to so many things these days...  There's an app for that

If you have a smart watch you can create your own watch face as you like it 
with underlying code

For example

https://play.google.com/store/search?q=watchmaker=apps=en

shows all the watch-face making apps for android smart watches

I only found one reference to EoT in the G+ forum for the first (WatchMaker) app
(The e-watch was a recreation of a two sided real watch with EoT but they 
didnt' seem to have replicated the second side that had the EoT)
so there's a gap in the market to be plugged!


And in case anyone is interested .  If you want a mechanical watch with EoT 
here's a watch selling site with a search included
http://www.chrono24.co.uk/search/index.htm?query=equation+of+time=true=1
But expect to be paying at least one kidney



Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze




From: sundial <sundial-boun...@uni-koeln.de> on behalf of Willy Leenders 
<willy.leend...@telenet.be>
Sent: 08 October 2016 18:15
To: rodwall1...@gmail.com
Cc: Kevin Karney; Sundial list
Subject: Re: Longcase Clock with Equation of TIme


More interesting is to know whether there exist modern timepieces which 
indicate the solar time.
With the possibilities of electronics and a built-in GPS system it can not be 
so difficult.


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 8-okt-2016, om 19:32 heeft 
rodwall1...@gmail.com<mailto:rodwall1...@gmail.com> het volgende geschreven:

Hi all,

This is an interesting website on equation clocks.

https://en.m.wikipedia.org/wiki/Equation_clock

Regards,

Roderick Wall.

- Reply message -
From: "Kevin Karney" <kar...@me.com<mailto:kar...@me.com>>
To: "rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>" 
<rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>>
Cc: "Sundial list" <sundial@uni-koeln.de<mailto:sundial@uni-koeln.de>>
Subject: Longcase Clock with Equation of TIme
Date: Sat, Oct 8, 2016 4:28 AM


As explained by Fred Sawyer in a recent lecture to the British Sundial Society, 
if often worked the other way around... people had an equation table and all 
kinds of rules so that they could adjust their clock so that it matched dial 
time for as long as possible.

Dial time was (and still is for some) 'true' time. The acceptance of local mean 
time was a slow process. Likewise the acceptance of national mean time met with 
a great deal of resistance. In Dorchester in 1858, in the UK, a judge in a 
court case found in favour of the plaintiff, since the defendant was not 
present at 10:00 o'clock when the case was scheduled. The court was using GMT. 
The defendant arrived at 10:00 local mean time - a few minutes late. He 
appealed and the appeal judge ruled...
"Ten o’clock is 10 o’clock according to the Time of the Place and the Town 
Council cannot say that it is not, 
but that it is 10 o’clock by Greenwich 
time. Nor can the time be altered by a railway company.… Nor by any person who 
regulates the clock on the Town-Hall."

Unless you lived in a (maritime) city, or had an astronomer on hand, or a local 
rich man who went up to the city and owned a chronometer, there was NO way to 
set a clock without a Sundial. It all changed with the the arrival of the 
telegraph   I have found that this is something that watch and clock 
enthusiasts sometimes forget!

Kevin

Sent from my iPad

> On 7 Oct 2016, at 11:07, rodwall1...@gmail.com<mailto:rodwall1...@gmail.com> 
> <rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>> wrote:
>
> Hi all,
>
> In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
> gave a small window sundial to allow you to set your clock. With a equation 
> of time table. Is that correct?
>
> Roderick Wall..
>
>
> - Reply message -
> From: "Robert Terwilliger" <

Re: Longcase Clock with Equation of TIme

[Ian Maddocks]

hi Willy


As is the answer to so many things these days...  There's an app for that

If you have a smart watch you can create your own watch face as you like it 
with underlying code

For example

https://play.google.com/store/search?q=watchmaker=apps=en

shows all the watch-face making apps for android smart watches

I only found one reference to EoT in the G+ forum for the first (WatchMaker) app
(The e-watch was a recreation of a two sided real watch with EoT but they 
didnt' seem to have replicated the second side that had the EoT)
so there's a gap in the market to be plugged!


And in case anyone is interested .  If you want a mechanical watch with EoT 
here's a watch selling site with a search included
http://www.chrono24.co.uk/search/index.htm?query=equation+of+time=true=1
But expect to be paying at least one kidney



Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze




From: sundial <sundial-boun...@uni-koeln.de> on behalf of Willy Leenders 
<willy.leend...@telenet.be>
Sent: 08 October 2016 18:15
To: rodwall1...@gmail.com
Cc: Kevin Karney; Sundial list
Subject: Re: Longcase Clock with Equation of TIme


More interesting is to know whether there exist modern timepieces which 
indicate the solar time.
With the possibilities of electronics and a built-in GPS system it can not be 
so difficult.


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 8-okt-2016, om 19:32 heeft 
rodwall1...@gmail.com<mailto:rodwall1...@gmail.com> het volgende geschreven:

Hi all,

This is an interesting website on equation clocks.

https://en.m.wikipedia.org/wiki/Equation_clock

Regards,

Roderick Wall.

- Reply message -
From: "Kevin Karney" <kar...@me.com<mailto:kar...@me.com>>
To: "rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>" 
<rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>>
Cc: "Sundial list" <sundial@uni-koeln.de<mailto:sundial@uni-koeln.de>>
Subject: Longcase Clock with Equation of TIme
Date: Sat, Oct 8, 2016 4:28 AM


As explained by Fred Sawyer in a recent lecture to the British Sundial Society, 
if often worked the other way around... people had an equation table and all 
kinds of rules so that they could adjust their clock so that it matched dial 
time for as long as possible.

Dial time was (and still is for some) 'true' time. The acceptance of local mean 
time was a slow process. Likewise the acceptance of national mean time met with 
a great deal of resistance. In Dorchester in 1858, in the UK, a judge in a 
court case found in favour of the plaintiff, since the defendant was not 
present at 10:00 o'clock when the case was scheduled. The court was using GMT. 
The defendant arrived at 10:00 local mean time - a few minutes late. He 
appealed and the appeal judge ruled...
"Ten o’clock is 10 o’clock according to the Time of the Place and the Town 
Council cannot say that it is not, 
but that it is 10 o’clock by Greenwich 
time. Nor can the time be altered by a railway company.… Nor by any person who 
regulates the clock on the Town-Hall."

Unless you lived in a (maritime) city, or had an astronomer on hand, or a local 
rich man who went up to the city and owned a chronometer, there was NO way to 
set a clock without a Sundial. It all changed with the the arrival of the 
telegraph   I have found that this is something that watch and clock 
enthusiasts sometimes forget!

Kevin

Sent from my iPad

> On 7 Oct 2016, at 11:07, rodwall1...@gmail.com<mailto:rodwall1...@gmail.com> 
> <rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>> wrote:
>
> Hi all,
>
> In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
> gave a small window sundial to allow you to set your clock. With a equation 
> of time table. Is that correct?
>
> Roderick Wall..
>
>
> - Reply message -
> From: "Robert Terwilliger" <b...@twigsdigs.com<mailto:b...@twigsdigs.com>>
> To: "'Ian Maddocks'" 
> <ian_maddo...@hotmail.com<mailto:ian_maddo...@hotmail.com>>, "'Sundial list'" 
> <sundial@uni-koeln.de<mailto:sundial@uni-koeln.de>>
> Subject: Longcase Clock with Equation of TIme
> Date: Fri, Oct 7, 2016 1:00 PM
>
> If you had a similar clock in 1730 - located where you didn't have access to
> another accurate clock, a sundial would be the only way you could set it -
> and to do so you would need to know the equation for the date.
>
>
>
> Bob
>
>
>
>   _
>
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
> Maddocks
> Sent: Wednesday, October 5, 2016 12:29 PM
> 

Re: Longcase Clock with Equation of TIme

[rodwall1...@gmail.com]

Hi all,
This is an interesting website on equation clocks.

https://en.m.wikipedia.org/wiki/Equation_clock

Regards,

Roderick Wall.

- Reply message -
From: "Kevin Karney" <kar...@me.com>
To: "rodwall1...@gmail.com" <rodwall1...@gmail.com>
Cc: "Sundial list" <sundial@uni-koeln.de>
Subject: Longcase Clock with Equation of TIme
Date: Sat, Oct 8, 2016 4:28 AM

As explained by Fred Sawyer in a recent lecture to the British Sundial Society, 
if often worked the other way around... people had an equation table and all 
kinds of rules so that they could adjust their clock so that it matched dial 
time for as long as possible. 

Dial time was (and still is for some) 'true' time. The acceptance of local mean 
time was a slow process. Likewise the acceptance of national mean time met with 
a great deal of resistance. In Dorchester in 1858, in the UK, a judge in a 
court case found in favour of the plaintiff, since the defendant was not 
present at 10:00 o'clock when the case was scheduled. The court was using GMT. 
The defendant arrived at 10:00 local mean time - a few minutes late. He 
appealed and the appeal judge ruled...
"Ten o’clock is 10 o’clock according to the Time of the Place and the Town 
Council cannot say that it is not, 
but that it is 10 o’clock by Greenwich 
time. Nor can the time be altered by a railway company.… Nor by any person who 
regulates the clock on the Town-Hall."

Unless you lived in a (maritime) city, or had an astronomer on hand, or a local 
rich man who went up to the city and owned a chronometer, there was NO way to 
set a clock without a Sundial. It all changed with the the arrival of the 
telegraph   I have found that this is something that watch and clock 
enthusiasts sometimes forget!

Kevin

Sent from my iPad

> On 7 Oct 2016, at 11:07, rodwall1...@gmail.com <rodwall1...@gmail.com> wrote:
> 
> Hi all,
> 
> In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
> gave a small window sundial to allow you to set your clock. With a equation 
> of time table. Is that correct?
> 
> Roderick Wall..
> 
> 
> - Reply message -
> From: "Robert Terwilliger" <b...@twigsdigs.com>
> To: "'Ian Maddocks'" <ian_maddo...@hotmail.com>, "'Sundial list'" 
> <sundial@uni-koeln.de>
> Subject: Longcase Clock with Equation of TIme
> Date: Fri, Oct 7, 2016 1:00 PM
> 
> If you had a similar clock in 1730 - located where you didn't have access to
> another accurate clock, a sundial would be the only way you could set it -
> and to do so you would need to know the equation for the date. 
> 
>  
> 
> Bob
> 
>  
> 
>   _  
> 
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
> Maddocks
> Sent: Wednesday, October 5, 2016 12:29 PM
> To: Sundial list
> Subject: Longcase Clock with Equation of TIme
> 
>  
> 
> hi folks
> 
>  
> 
> I was just blundering around the internet when I came across the following
> that may be of interest..
> 
>  
> 
> A long case clock from 1730 London that has an annual dial for displaying
> the date and the equation of time
> 
> http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-yea
> r-calendar-longcase-clock-by-john-topping-london/170271
> 
> It's a premade disk with EoT table that rotates in a year, not a P type
> kidney cam, but was new clock complication to me
> 
>  
> 
> greetings from 
> 
>  
> 
> Ian Maddocks
> Chester, UK
> 53°11'50"N  2°52'41"W
> frog.happy.froze
> 
>  
> 
>  
> 
>  
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Longcase Clock with Equation of TIme

[rodwall1...@gmail.com]

Hi all,
And thanks to all who commented on clocks that have the equation of time on the 
dial. So many of you had something interesting from court cases, bath clocks, 
watches with equation dials etc. 

I did not know that there were clocks that had equation of time dials. I always 
thought that a equation of time table was use to set the clocks from sundials.

I would love to have a watch or pocket watch or even a clock that has a 
equation of time dial. But not at the $30,000 prices that they are asking.
Is there any reasonably priced modern clocks or watches today that have the 
equation of time dials?

Thanks all for such a interesting subject. So many of you have so much 
interesting knowledge thanks.

Regards,

Roderick Wall.

- Reply message -
From: "Kevin Karney" <kar...@me.com>
To: "rodwall1...@gmail.com" <rodwall1...@gmail.com>
Cc: "Sundial list" <sundial@uni-koeln.de>
Subject: Longcase Clock with Equation of TIme
Date: Sat, Oct 8, 2016 4:28 AM

As explained by Fred Sawyer in a recent lecture to the British Sundial Society, 
if often worked the other way around... people had an equation table and all 
kinds of rules so that they could adjust their clock so that it matched dial 
time for as long as possible. 

Dial time was (and still is for some) 'true' time. The acceptance of local mean 
time was a slow process. Likewise the acceptance of national mean time met with 
a great deal of resistance. In Dorchester in 1858, in the UK, a judge in a 
court case found in favour of the plaintiff, since the defendant was not 
present at 10:00 o'clock when the case was scheduled. The court was using GMT. 
The defendant arrived at 10:00 local mean time - a few minutes late. He 
appealed and the appeal judge ruled...
"Ten o’clock is 10 o’clock according to the Time of the Place and the Town 
Council cannot say that it is not, 
but that it is 10 o’clock by Greenwich 
time. Nor can the time be altered by a railway company.… Nor by any person who 
regulates the clock on the Town-Hall."

Unless you lived in a (maritime) city, or had an astronomer on hand, or a local 
rich man who went up to the city and owned a chronometer, there was NO way to 
set a clock without a Sundial. It all changed with the the arrival of the 
telegraph   I have found that this is something that watch and clock 
enthusiasts sometimes forget!

Kevin

Sent from my iPad

> On 7 Oct 2016, at 11:07, rodwall1...@gmail.com <rodwall1...@gmail.com> wrote:
> 
> Hi all,
> 
> In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
> gave a small window sundial to allow you to set your clock. With a equation 
> of time table. Is that correct?
> 
> Roderick Wall..
> 
> 
> - Reply message -
> From: "Robert Terwilliger" <b...@twigsdigs.com>
> To: "'Ian Maddocks'" <ian_maddo...@hotmail.com>, "'Sundial list'" 
> <sundial@uni-koeln.de>
> Subject: Longcase Clock with Equation of TIme
> Date: Fri, Oct 7, 2016 1:00 PM
> 
> If you had a similar clock in 1730 - located where you didn't have access to
> another accurate clock, a sundial would be the only way you could set it -
> and to do so you would need to know the equation for the date. 
> 
>  
> 
> Bob
> 
>  
> 
>   _  
> 
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
> Maddocks
> Sent: Wednesday, October 5, 2016 12:29 PM
> To: Sundial list
> Subject: Longcase Clock with Equation of TIme
> 
>  
> 
> hi folks
> 
>  
> 
> I was just blundering around the internet when I came across the following
> that may be of interest..
> 
>  
> 
> A long case clock from 1730 London that has an annual dial for displaying
> the date and the equation of time
> 
> http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-yea
> r-calendar-longcase-clock-by-john-topping-london/170271
> 
> It's a premade disk with EoT table that rotates in a year, not a P type
> kidney cam, but was new clock complication to me
> 
>  
> 
> greetings from 
> 
>  
> 
> Ian Maddocks
> Chester, UK
> 53°11'50"N  2°52'41"W
> frog.happy.froze
> 
>  
> 
>  
> 
>  
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Longcase Clock with Equation of TIme

[Kevin Karney]

As explained by Fred Sawyer in a recent lecture to the British Sundial Society, 
if often worked the other way around... people had an equation table and all 
kinds of rules so that they could adjust their clock so that it matched dial 
time for as long as possible. 

Dial time was (and still is for some) 'true' time. The acceptance of local mean 
time was a slow process. Likewise the acceptance of national mean time met with 
a great deal of resistance. In Dorchester in 1858, in the UK, a judge in a 
court case found in favour of the plaintiff, since the defendant was not 
present at 10:00 o'clock when the case was scheduled. The court was using GMT. 
The defendant arrived at 10:00 local mean time - a few minutes late. He 
appealed and the appeal judge ruled...
"Ten o’clock is 10 o’clock according to the Time of the Place and the Town 
Council cannot say that it is not, 
but that it is 10 o’clock by Greenwich 
time. Nor can the time be altered by a railway company.… Nor by any person who 
regulates the clock on the Town-Hall."

Unless you lived in a (maritime) city, or had an astronomer on hand, or a local 
rich man who went up to the city and owned a chronometer, there was NO way to 
set a clock without a Sundial. It all changed with the the arrival of the 
telegraph   I have found that this is something that watch and clock 
enthusiasts sometimes forget!

Kevin

Sent from my iPad

> On 7 Oct 2016, at 11:07, rodwall1...@gmail.com <rodwall1...@gmail.com> wrote:
> 
> Hi all,
> 
> In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
> gave a small window sundial to allow you to set your clock. With a equation 
> of time table. Is that correct?
> 
> Roderick Wall..
> 
> 
> - Reply message -
> From: "Robert Terwilliger" <b...@twigsdigs.com>
> To: "'Ian Maddocks'" <ian_maddo...@hotmail.com>, "'Sundial list'" 
> <sundial@uni-koeln.de>
> Subject: Longcase Clock with Equation of TIme
> Date: Fri, Oct 7, 2016 1:00 PM
> 
> If you had a similar clock in 1730 - located where you didn't have access to
> another accurate clock, a sundial would be the only way you could set it -
> and to do so you would need to know the equation for the date. 
> 
>  
> 
> Bob
> 
>  
> 
>   _  
> 
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
> Maddocks
> Sent: Wednesday, October 5, 2016 12:29 PM
> To: Sundial list
> Subject: Longcase Clock with Equation of TIme
> 
>  
> 
> hi folks
> 
>  
> 
> I was just blundering around the internet when I came across the following
> that may be of interest..
> 
>  
> 
> A long case clock from 1730 London that has an annual dial for displaying
> the date and the equation of time
> 
> http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-yea
> r-calendar-longcase-clock-by-john-topping-london/170271
> 
> It's a premade disk with EoT table that rotates in a year, not a P type
> kidney cam, but was new clock complication to me
> 
>  
> 
> greetings from 
> 
>  
> 
> Ian Maddocks
> Chester, UK
> 53°11'50"N  2°52'41"W
> frog.happy.froze
> 
>  
> 
>  
> 
>  
> 
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
> 
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

RE: Longcase Clock with Equation of TIme

[Schechner, Sara]

All good clocks were set by sundial or observation of the sun’s transit or 
stars until the mid-19th century and the use of time signals sent along 
telegraph lines.  Some people then set their personal clocks or watches to 
these observatory or town clocks (often set up by jewelers or clock shops—you 
still see these “street clocks”), but many preferred to use their own sundials 
or dipleidoscopes  to set their clocks or watches.  Pocket watches had “watch 
papers” in the case that  gave the equation of time and advertised the 
watchmaker who last cleaned the watch.

Cheers,
Sara

Sara J. Schechner
Altazimuth Arts
42°36'N   71° 22'W
West Newton, MA 02465
http://www.altazimutharts.com/

Sara J. Schechner, Ph.D.
David P. Wheatland Curator of the Collection of Historical Scientific 
Instruments
Lecturer on the History of Science
Department of the History of Science, Harvard University
Science Center 251c, 1 Oxford Street, Cambridge, MA 02138
Tel: 617-496-9542   |   Fax: 617-496-5932   |   
sche...@fas.harvard.edu<mailto:sche...@fas.harvard.edu>  | @SaraSchechner
http://scholar.harvard.edu/saraschechner
http://chsi.harvard.edu/




From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of 
rodwall1...@gmail.com
Sent: Friday, October 07, 2016 6:07 AM
To: 'Sundial list'
Subject: Re: Longcase Clock with Equation of TIme

Hi all,

In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
gave a small window sundial to allow you to set your clock. With a equation of 
time table. Is that correct?

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

Re: Longcase Clock with Equation of TIme

[rodwall1...@gmail.com]

Hi all,
In 1730. I think I heard somewhere that. Clock manufacturers also sometimes 
gave a small window sundial to allow you to set your clock. With a equation of 
time table. Is that correct?

Roderick Wall..

- Reply message -
From: "Robert Terwilliger" <b...@twigsdigs.com>
To: "'Ian Maddocks'" <ian_maddo...@hotmail.com>, "'Sundial list'" 
<sundial@uni-koeln.de>
Subject: Longcase Clock with Equation of TIme
Date: Fri, Oct 7, 2016 1:00 PM

If you had a similar clock in 1730 - located where you didn't have access to
another accurate clock, a sundial would be the only way you could set it -
and to do so you would need to know the equation for the date. 



Bob



_  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
Maddocks
Sent: Wednesday, October 5, 2016 12:29 PM
To: Sundial list
Subject: Longcase Clock with Equation of TIme



hi folks



I was just blundering around the internet when I came across the following
that may be of interest..



A long case clock from 1730 London that has an annual dial for displaying
the date and the equation of time

http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-yea
r-calendar-longcase-clock-by-john-topping-london/170271

It's a premade disk with EoT table that rotates in a year, not a P type
kidney cam, but was new clock complication to me



greetings from 



Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze---
https://lists.uni-koeln.de/mailman/listinfo/sundial

RE: Longcase Clock with Equation of TIme

[Robert Terwilliger]

If you had a similar clock in 1730 - located where you didn't have access to
another accurate clock, a sundial would be the only way you could set it -
and to do so you would need to know the equation for the date. 

 

Bob

 

  _  

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Ian
Maddocks
Sent: Wednesday, October 5, 2016 12:29 PM
To: Sundial list
Subject: Longcase Clock with Equation of TIme

 

hi folks

 

I was just blundering around the internet when I came across the following
that may be of interest..

 

A long case clock from 1730 London that has an annual dial for displaying
the date and the equation of time

http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-yea
r-calendar-longcase-clock-by-john-topping-london/170271

It's a premade disk with EoT table that rotates in a year, not a P type
kidney cam, but was new clock complication to me

 

greetings from 

 

Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze

 

 

 

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RE: Longcase Clock with Equation of TIme

[Schechner, Sara]

Let us not forget the famous long-case clock by Thomas Tompion in 1709 for the 
Pump Room in Bath, England.  It is an “equation clock” showing the difference 
between solar and mean time.   Here is a link to an image of the dial:
https://www.duetimeblog.com/wp-content/uploads/2009/09/img_2007.jpg

Tompion also placed a sundial outside of the Pump Room.   See 
http://bathsbloggers.blogspot.com/2016/03/the-tompion-clock.html for a photo 
along with the clock.

Cheers,
Sara

Sara J. Schechner
Altazimuth Arts
42°36'N   71° 22'W
West Newton, MA 02465
http://www.altazimutharts.com/

Sara J. Schechner, Ph.D.
David P. Wheatland Curator of the Collection of Historical Scientific 
Instruments
Lecturer on the History of Science
Department of the History of Science, Harvard University
Science Center 251c, 1 Oxford Street, Cambridge, MA 02138
Tel: 617-496-9542   |   Fax: 617-496-5932
sche...@fas.harvard.edu |@SaraSchechner
http://scholar.harvard.edu/saraschechner
http://chsi.harvard.edu/



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Re: Longcase Clock with Equation of TIme

[rodwall1...@gmail.com]

Hi Ian,
Thanks for this link. Very interesting I've never see this before.

I wonder if there are any other clocks with the equation of time on the dial.

And in what form is the equation of time shown on the clock dial.

Regards,

Roderick Wall.

- Reply message -
From: "Ian Maddocks" <ian_maddo...@hotmail.com>
To: "Sundial list" <sundial@uni-koeln.de>
Subject: Longcase Clock with Equation of TIme
Date: Thu, Oct 6, 2016 3:28 AM

hi folks


I was just blundering around the internet when I came across the following that 
may be of interest..


A long case clock from 1730 London that has an annual dial for displaying the 
date and the equation of time

http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-year-calendar-longcase-clock-by-john-topping-london/170271
It's a premade disk with EoT table that rotates in a year, not a P type 
kidney cam, but was new clock complication to me

greetings from

Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Longcase Clock with Equation of TIme

[Ian Maddocks]

hi folks


I was just blundering around the internet when I came across the following that 
may be of interest..


A long case clock from 1730 London that has an annual dial for displaying the 
date and the equation of time

http://www.raffetyclocks.com/antique-clocks/d/antique-month-equation-and-year-calendar-longcase-clock-by-john-topping-london/170271
It's a premade disk with EoT table that rotates in a year, not a P type 
kidney cam, but was new clock complication to me

greetings from

Ian Maddocks
Chester, UK
53°11'50"N  2°52'41"W
frog.happy.froze



---
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