Dear Kevin, Thanks a lot for putting together this very nice site ! You will also have to write the book. The EOT is such a fundamental ‘cultural and social’ topic that it deserves a proper discussion.
In the chapter THE EQUATION OF TIME IN ASTRONOMY & NAVIGATION it could be very nice to add the equation of time table from Kepler’s Tabulae Rudolphinae. It is the first calculation using the correct elliptical orbit (Kepler equation) For the section SHAPED STYLE SUNDIALS There is the original ‘invention’ by John Ryder Oliver https://www.helios-sonnenuhren.de/de/chronos-geschichte On the same site you find a picture of a realization and also one dial by Martin Bernhard that incorporates the idea. I have thought a lot about how eliminate the problem of having to change the Style every 6 months, and I came up with a ‘Double-Style’ http://riegler.home.cern.ch/riegler/sundial/mainpage.htm There are some pictures and details given on this page. What I like particularly is that when looking from the edge of the equatiorial disc to the style it projects the Analemma curve onto the sky. There is a photo under the tab ‘Analemma’. best regards Werner Riegler On 9 Sep 2018, at 01:38, Kevin Karney via sundial <[email protected]<mailto:[email protected]>> wrote: Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die eigentliche Nachricht steht dadurch in einem Anhang. This message was wrapped to be DMARC compliant. The actual message text is therefore in an attachment. From: Kevin Karney <[email protected]<mailto:[email protected]>> Subject: A new website : Equation-of-Time.info<http://Equation-of-Time.info> Date: 9 September 2018 at 01:38:22 GMT+2 To: tonylindisun--- via sundial <[email protected]<mailto:[email protected]>> Dear colleagues and friends I have spent a lot of time over the last few years in front of my computer thinking about the Equation of Time. Recently my son asked where all the output of my studies resided. At first, I thought I should write a book. But instead I acquired a new domain and found that Adobe had a simple package that allows one to make a nice looking website with little technical effort. You can find the website at https://Equation-of-Time.info<https://equation-of-time.info/> It contains three main sections, all copiously illustrated... 1. The Equation of Time - 8 pages. Here, see the videos on why the Equation of Time looks as it does (under the page ‘The components of the Equation of Time’). I am particularly proud of these! 2. Sundials that are (or can be) Equation corrected - 8 pages 3. Mechanical Means to Simulate the EoT - 6 pages. I have been harvesting images of EoT related things for many years, often without recording where they came from. So if I have included an image of yours and have not attributed it to you, please let me know. Please do have a look and send comments/additions/corrections/improvements Best wishes Kevin Karney - from Wales --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
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