Re: Gnomon of Saint-Sulpice

[Claude Hartman]

An interesting question and more interesting history.

In J. L. Heilbron's book, The Sun in the Church, page 225 he describes 
why the higher hole ( and lens) was placed.  It seems it was more of a 
way to get a larger midsummer image so that it was as good as the 
midwinter one.


An interesting historical note on page 224  was that the fact that part 
of the meridian ran behind the balustrade played a role in saving it 
from destruction by revolutionaries in 1799.


On 4/3/2016 1:39 PM, Roger W. Sinnott wrote:


Dan,

I’m just guessing, but maybe the two holes and two spots are placed so 
that, no matter what the Sun’s declination is, at least one of the 
spots will fall on a smooth, uncluttered part of the floor.


Roger

*From:*sundial [mailto:sundial-boun...@uni-koeln.de] *On Behalf Of 
*Dan-George Uza

*Sent:* Sunday, April 03, 2016 3:23 PM
*To:* sundial@uni-koeln.de
*Subject:* Gnomon of Saint-Sulpice

Hello,

Last week I visited the meridian line of Saint-Sulpice in Paris which 
dates back to 1743. After the French Revolution the Republicans 
chiseled out all references to royalty from the inscriptions. I don't 
know why but they also erased some of the zodiac signs. Could it have 
something to do with the new Republican Calendar? Also, there are two 
holes for the light to enter with two spots forming on the ground and 
I don't understand exactly why...


Dan Uza



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



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

Re: Gnomon of Saint-Sulpice

[Ray]

Hi Roger,

For anyone interested I found this information on "From Wikipedia, the
free encyclopedia" about to Sundial at the church with some more pic's
please scroll to the bottom under Gnomon.
https://en.wikipedia.org/wiki/Church_of_Saint-Sulpice,_Paris

Ray

On 4/3/16, Roger W. Sinnott  wrote:
> Dan,
>
>
>
> I’m just guessing, but maybe the two holes and two spots are placed so that,
> no matter what the Sun’s declination is, at least one of the spots will fall
> on a smooth, uncluttered part of the floor.
>
>
>
>  Roger
>
>
>
>
>
> From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George
> Uza
> Sent: Sunday, April 03, 2016 3:23 PM
> To: sundial@uni-koeln.de
> Subject: Gnomon of Saint-Sulpice
>
>
>
> Hello,
>
>
>
> Last week I visited the meridian line of Saint-Sulpice in Paris which dates
> back to 1743. After the French Revolution the Republicans chiseled out all
> references to royalty from the inscriptions. I don't know why but they also
> erased some of the zodiac signs. Could it have something to do with the new
> Republican Calendar? Also, there are two holes for the light to enter with
> two spots forming on the ground and I don't understand exactly why...
>
>
>
> Dan Uza
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

RE: Gnomon of Saint-Sulpice

[Roger W. Sinnott]

Dan,

 

I’m just guessing, but maybe the two holes and two spots are placed so that, no 
matter what the Sun’s declination is, at least one of the spots will fall on a 
smooth, uncluttered part of the floor.

 

 Roger

 

 

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George Uza
Sent: Sunday, April 03, 2016 3:23 PM
To: sundial@uni-koeln.de
Subject: Gnomon of Saint-Sulpice

 

Hello,

 

Last week I visited the meridian line of Saint-Sulpice in Paris which dates 
back to 1743. After the French Revolution the Republicans chiseled out all 
references to royalty from the inscriptions. I don't know why but they also 
erased some of the zodiac signs. Could it have something to do with the new 
Republican Calendar? Also, there are two holes for the light to enter with two 
spots forming on the ground and I don't understand exactly why...

 

Dan Uza

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