NYTimes.com Article: Solar-Powered Timekeeping in Paris

[bobt]

This article from NYTimes.com 
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Here's A link to "Solar-Powered Timekeeping in Paris" from the New York Times. 
The Times has an on-line service which is free.

Bob Terwilliger 

[EMAIL PROTECTED]


Solar-Powered Timekeeping in Paris

March 16, 2003
By SUSAN ALLPORT 




The city's sundials turn thoughts to the temporal nature of
things. 

http://www.nytimes.com/2003/03/16/travel/16bpsun.html?ex=1048847177&ei=1&en=11b1bee0f47c523a



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Sundials in Paris

[GinnyandHalB]

Please note the article on page 17 in this Sunday's New York Times Travel Section entitled "Solar-Powered Timekeeping in Paris".  The author's reference for her sundial search was "Cadrans Solaires de Paris" by Andre Gotteland and Georges Camus.

Fred Sawyer - perhaps you could send some information to the author and her husband on the benefits of NASS membership?

Hal Brandmaier

Re: Sundials in Paris

[Larry McDavid]

A thermonuclear-radiant-energy powered, relativistic-independent and 
spatial-independent continuum display providing automatic power-cycling.


Larry McDavid


Thibaud Taudin-Chabot wrote:

I thought that all sundials are solar powered: no sun, no reading.

An alternative definition of a sundial:
A sundial is a time device driven by solar power with an automatic reset 
after power failure.


Thibaud Chabot

At 12:18 16-03-2003 -0500, you wrote:


3-16-03

Please note the article on page 17 in this Sunday's New York Times 
Travel Section entitled "Solar-Powered Timekeeping in Paris".  The 
author's reference for her sundial search was "Cadrans Solaires de 
Paris" by Andre Gotteland and Georges Camus.


Fred Sawyer - perhaps you could send some information to the author 
and her husband on the benefits of NASS membership?


Hal Brandmaier 


-
Th. Taudin Chabot, home email: [EMAIL PROTECTED]




--
Best wishes,

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


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Re: Sundials in Paris

[Richard Langley]

The article is available on line at
.
Concerning the Salvador Dali dial, as I recall, it's not mounted correctly.
It's not on the correct facing wall.
-- Richard Langley

On Sun, 16 Mar 2003 [EMAIL PROTECTED] wrote:

>3-16-03
>
>Please note the article on page 17 in this Sunday's New York Times Travel
>Section entitled "Solar-Powered Timekeeping in Paris".  The author's
>reference for her sundial search was "Cadrans Solaires de Paris" by Andre
>Gotteland and Georges Camus.
>
>Fred Sawyer - perhaps you could send some information to the author and her
>husband on the benefits of NASS membership?
>
>Hal Brandmaier
>


===
 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: Sundial Support

[Roger Bailey]

Hi 
Hal,
 
I 
would recommend grout rather than mortar. Portland cement grout has better 
adhesion, load bearing and lower shrinkage compared to mortar. Let me quote the 
description on the half bag of all purpose grout that I have in the garage. 
Sika is the local brand name.
 
"Sika 
Grout 212 is a preblended, ready to use portland cement grout containing non 
ferrous admixes to counteract settling and drying shrinkage. General 
applications include the grouting of structural column base plates, machinery 
base plates, anchor bolts, bearing plates, anchor rods, bearing plates, pressure 
grouting and for underpinning".
 
It 
doesn't mention setting sundials but the applications described are similar. 
Grout is fairly fluid so you may require a temporary dam to hold things in place 
if your gap from the latitude adjustment is significant.
 
There 
are other patching concrete mixes that may be applicable as well. These contain 
adhesives like latex that may give a better bond for your anchor 
bolt.
 
Roger 
Bailey
Walking Shadow Designs
N 
51  W 115
 

  -Original Message-From: 
  [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On 
  Behalf Of [EMAIL PROTECTED]Sent: March 15, 2003 10:46 
  AMTo: sundial@rrz.uni-koeln.deSubject: Sundial 
  Support3-16-03I need some guidance!One of 
  my projects is to support a horizontal bronze sundial on a cylindrical 
  concrete base ( faced with decorative stone).  The dial has a short 3/8" 
  threaded brass rod inserted at the center of its bottom surface.  I plan 
  to drill an oversize hole in the concrete cylinder to accept the threaded 
  rod.  Then I will add a layer of mortar (correct term ?) to fill the hole 
  and the space between the bottom of the dial and the concrete cylinder to 
  correct for the difference between the as-designed and as-installed 
  latitudes.  I will use wood spacers to support the dial while the mortar 
  cures.In writing the installation procedure for use by the town 
  workman and myself, I realized that I know very little about the use of mortar 
  as an adhesive. So my question is "What type of mortar would both fill the 
  hole for the rod and provide a good bond between the concrete cylinder and the 
  bronze sundial, and is there any special surface preparation 
  needed?"Thanks for your help,Hal Brandmaier  
  Latitude: 40 degr 59 min NLongitude: 73 degr 59 min W 
  

Re: Sundials in Paris

[Thibaud Taudin-Chabot]

I thought that all sundials are solar powered: no sun, no
reading.
An alternative definition of a sundial:
A sundial is a time device driven by solar power with an automatic reset
after power failure.
Thibaud Chabot
At 12:18 16-03-2003 -0500, you wrote:
3-16-03
Please note the article on page 17 in this Sunday's New York Times Travel
Section entitled "Solar-Powered Timekeeping in Paris". 
The author's reference for her sundial search was "Cadrans Solaires
de Paris" by Andre Gotteland and Georges Camus.
Fred Sawyer - perhaps you could send some information to the author and
her husband on the benefits of NASS membership?
Hal Brandmaier 

-
Th. Taudin Chabot, home email: [EMAIL PROTECTED]

Re: Sundial Support

[Tony Moss]

Hal wrote:

>One of my projects is to support a horizontal bronze sundial on a 
>cylindrical 
>concrete base ( faced with decorative stone).  The dial has a short 3/8" 
>threaded brass rod inserted at the center of its bottom surface.  I plan to 
>drill an oversize hole in the concrete cylinder to accept the threaded rod.  
>Then I will add a layer of mortar (correct term ?) to fill the hole and the 
>space between the bottom of the dial and the concrete cylinder to correct 
>for 
>the difference between the as-designed and as-installed latitudes.  I will 
>use wood spacers to support the dial while the mortar cures.
>
>In writing the installation procedure for use by the town workman and 
>myself, 
>I realized that I know very little about the use of mortar as an adhesive. 
>So 
>my question is "What type of mortar would both fill the hole for the rod and 
>provide a good bond between the concrete cylinder and the bronze sundial, 
>and 
>is there any special surface preparation needed?"


You don't mention the actual length of the projecting threaded rod but if 
it is long enough to accept a nut fixed to the extreme tip with epoxy 
adhesive this would allow a sloppy mortar/grout mix to flow around it and 
'key' the dial VERY firmly down.  If the projection is too short for this 
I would obtain a short length of threaded rod (called 'studding' in the 
uk) or perhaps a short bolt with the same thread.  These could be joined 
to your existing projection by being screwed in half way from opposite 
ends of a mutual nut to extend the rod.  The bolt head or an added nut 
would then give the mechanical 'key' into whatever setting medium you 
choose.  Again an epoxy adhesive would prevent the bolt/nut assembly from 
loosening.

Hope this makes sense.

Tony Moss.


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