I call sundials like this "Terminator" sundials as they tell time by the terminator line between the sunny and dark sides. It is not a sharp line like a shadow but still useful for telling time. Orientation is important. The concept works well on a cylinder as well as a sphere, as an azimuth sundial on a vertical cylinder. See this article on Fer De Vries website quoting from Mac Oglesby and Joël Robic. http://www.de-zonnewijzerkring.nl/art-arch/eng-home-art-07-03.htm The design is good to wrap around a beer or wine bottle. The beer version, starting and ending at the winter solstice, has a male silhouette. The wine version, starting and ending at the summer solstice, has a feminine wineglass figure. It will give you an opportunity to talk about sundials in a social setting. Download the macro and prepare for garden parties. I have given them to friends, wrapped around an appropriate bottle, with their birthday noted as a red date line.
Cheers, Roger Bailey From: Willy Leenders Sent: Thursday, May 02, 2013 1:02 PM To: Sundial sundiallist Subject: globe on the dome of the Gustaviaum The globe on the dome of the Gustavianum in Uppsala (Sweden) is a sundial. The shadow of the globe on the globe itself indicates the time. I want information about that operation as a sundial. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3272 / Virus Database: 3162/6291 - Release Date: 05/02/13 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3272 / Virus Database: 3162/6291 - Release Date: 05/02/13
<<sundial-Uppsala.jpg>>
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