I agree that showing local time on a sundial is something to be encouraged. The drawback is that it has to be explained every time to everyone - otherwise the impression being given is that "it does not work" !
Alex On 2 October 2015 at 12:12, Willy Leenders <[email protected]> wrote: > Dan, > > What I mean is this: > > 1. > Together with the sundial on the roof is given the EOT table. > What can you do with it? > As a result of the empirical way of construction on September 1 you can, > using the EOT table, determine the standard Eastern European Time on > other days. > Specifying the length correction you could also determine the true local > time > > 2. > To indicate the standard Eastern European Time you have many options: > clock, cell phone, computer ... > There's no need to a sundial. > Indicating the true local time is only possible on a sundial. > Let him do it ! > > > 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 > > > > > > > Op 1-okt-2015, om 22:06 heeft Dan-George Uza het volgende geschreven: > > Willy, > > I'm sorry but I did not quite understand your message. The dial is > supposed to show standard Eastern European Time, not true local time. The > longitude correction for Bistrita is already built in the hour marks > because they were empirically drawn according to the watch when EoT was 0. > Therefore the correction table only deals with variations in Eot. > > Dan > > On Thu, Oct 1, 2015 at 10:55 PM, Willy Leenders <[email protected] > > wrote: > >> A nice project for the decoration of the roof ! >> However, it is not possible to read the true local time. >> And one can not deduce it for the place at longitude: 24° 30′ 3.82′′ E >> (Bistrita) with only the table for EOTas a tool. >> >> >> 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 >> >> >> >> >> >> >> >> Op 1-okt-2015, om 21:24 heeft Dan-George Uza het volgende geschreven: >> >> Dear group, >> >> I am happy to be able to share a picture of the first Romanian reclining >> sundial built recently by Damaschin Berende, a friend from a neighboring >> town. It's made of plywood, it sits on a roof and it features both a EoT >> correction table and interchangeable hour marks for winter time and >> daylight saving time. Reported accuracy is so far around 1:30 min. >> Direction of gnomon across the roof was fixed by taking a plumb bob shadow >> reading >> from the base of the gnomon at local noon, the elevation angle was >> calculated according to the latitudine and the hours were marked on the >> shadow during September 1st, when EoT was 0. I especially like the wooden >> pole etched with traditional solar motifs and the rooster on top. You can >> view more photos here: >> >> http://cerculdestele.blogspot.ro/2015/10/sine-sole-sileo-ceasul-solar-inclinat.html >> >> Please also consider it for the Sundial of the Month on >> http://sundialatlas.eu using ID no. RO000023. >> >> Regards, >> >> Dan Uza >> <sine sole sileo -.jpg> >> --------------------------------------------------- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> >> >> > > > -- > Dan-George Uza > http://cerculdestele.blogspot.com > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > >
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
