Hi all, In earlier conversations which I had with Douglas Hunt, he was also reluctant to disclose the details of his design. As far as I can figure out, an exact solution for a double-ring analemmatic dial would be possible if DST would begin and end at the same solar declination. Roger Bailey pointed out how that can be done.
In the European Union, this is not quite the case, however: DST runs from the last Sunday of March to the last Sunday of October. So a bit of fiddling is necessary to accommodate the March and October parts of the date line, as they in principle need different scale factors. But the difference will generally go unnoticed, I presume. As far as I can see, no EoT correction is present in this design. Regards, Frans ====================== Frans W. Maes 53.1ƒN, 6.5ƒE www.biol.rug.nl/maes/sundials/ ----- Original Message ----- From: "Anselmo PÈrez Serrada" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, September 04, 2002 7:17 AM Subject: Re: Seeking any sundial enthusiasts in Turkey, (Istanbul area) > Frans URL on analemmatics is > http://www.biol.rug.nl/maes/zonnewijzers/welcome-e.htm > and it is really FANTASTIC. Congratulations, Frans! > > Roger is right on this of the double dateline, but (once again) what > about the EoT? I can't > see in the pictures any lines like these at Longwood Gardens > approximating (by minimum squares, > I believe) the EoT deviation. > > Anselmo > > - > -
