Excellent detective work Thibaud! And good pictures too. I was sure something was amiss with one of those two southerly dials. I was unable to find the other two east and west dials on the church wall. I don't think I looked at the stone corbels. They must be very small and high up.
John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com> ----- Original Message ----- From: "Thibaud Taudin-Chabot" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, September 18, 2002 1:32 PM Subject: Re: Amsterdam sundial John, Today I finally got the oppurtunity to check the 2 Amsterdam sundials on the New Church in the centre of the city. The churchwall is roughly declining 12° to the east. The big round sundial is mounted flat to the wall. So the style of the big dial is pointing to the left (seen from below) of the XII mark. The small sundial is however turned 12° to the west so it becomes a perfect south facing sundial. Standing directly beforebelow the two dials it is easy to see that the style of the small one is bent eastwards. It should be perpendicular to the dialface which can be deduced from the fact that the bottom mount of the style is directly below the XII mark. The style of the east dialface and the style of the west dialface are both missing. I wonder whether they have ever been present. It is a pity I didn't see the bent style when I made a very nice picture of it using the scaffolding when the wall was being cleaned. Thibaud Chabot PS. the pictures are not included in my email to the mailinglist. At 07:44 28-07-2002 -0700, you wrote: >Fer > >The Amsterdam dial(s) bothered me when I saw it. My memory isn't so good but >it was a cloudy day and I didn't have a watch. But if I remember the dials >showed different times, and their construction was different in style >position and face design. > >Do you know somebody in the Dutch Sundial Society that lives in Amsterdam >who could go to the church and get us some photographs? We need a photo >showing both dials and need to know watch time photo is taken. Or the next >time you're in the big city, you could take a look and settle the debate. > >John > >John L. Carmichael Jr. >Sundial Sculptures >925 E. Foothills Dr. >Tucson Arizona 85718 >USA > >Tel: 520-696-1709 >Email: [EMAIL PROTECTED] >Website: <http://www.sundialsculptures.com> >----- Original Message ----- >From: "fer j. de vries" <[EMAIL PROTECTED]> >To: "sundial" <[email protected]> >Sent: Sunday, July 28, 2002 4:04 AM >Subject: Re: Some ideas for constructing sundials > > > > Hello Valentin, > > > > Welcome to the list and thanks for your contribution. > > > > I downloaded your postscript file and calculated a Quadrant sundial. > > In fact these are portable sundials and you may find them in several >shapes. > > The program worked well and thanks for sharing it with us.. > > > > About the Amsterdam sundials: > > You stated: > > > > > The face of a "classical" sundial is the projection of a SINGLE POINT, > > > which is at some distance from the surface (usially flat). Therefore THE > > > BASIC POINT OF THE STYLE IS IRRELEVANT !!! > > > > In fact this is correct, however the Amsterdam sundials are dials with a > > pole style as shadow caster and the dial may be read with the entire line >of > > shadow of that pole style. > > For such dials the pole styles MUST be parrallel, even for a dial in > > Amsterdam and Harare. > > > > But the remark was that the styles weren't parallel. > > This could be because one of the styles wasn't mounted correct, as stated > > before. > > > > Another reason can be as it looks like the styles aren't parallel. > > The circular dial in top of the chursh is directly mounted to the wall >which > > wall declines some degrees to the east. > > The smaller dial at another spot of the same wall is a south facing dial >and > > is angled to the wall with the same wall-declination. > > So it might be an optical effect. > > I haven't the correct answer, I just gave a possible reason. > > > > The smaller dial at this church in fact is a triple sundial. > > It is a rather thick stone on which the south facing dial is drawn and on > > the west and east side of the stone also a sundial is drawn. > > > > Best wishes, Fer. > > > > Fer J. de Vries > > mailto:[EMAIL PROTECTED] > > http://www.iae.nl/users/ferdv/ > > Eindhoven, Netherlands > > lat. 51:30 N long. 5:30 E > > > > ----- Original Message ----- > > From: "Dr. Valentin Z. Hristov" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Sunday, July 28, 2002 8:31 AM > > Subject: Some ideas for constructing sundials > > > > > > > Dear Dialists, > > > > > snip.... > > > > > > > > > > - > > > >- ----------------------------------------------------------------- Th. Taudin Chabot, home email: [EMAIL PROTECTED] -
