Pete Swanstrom wrote: > > Bill: > > I have built two such sundials, which indicate the time and date > accurately to within the minute and the day. They also quickly adjust > for Daylight Saving Time. I have created a web page with a description > and pictures of both dials, including the method, calculations and data > I used for their design. Hope you find this useful. > > To All: > > This is my first post to this group, and the first time I have publicly > posted this web page address > (http://netnow.micron.net/~petes/sundial/index.htm). I would sincerely > appreciate your corrections, comments and suggestions. > > Much thanks. Pete Swanstrom > > [EMAIL PROTECTED] wrote: > > > > Could someone point me at a design for an analemmic dial design that > > uses a stationary gnomon that does not have to be positioned during > > the year. I have both an elliptic and a Lambert dial, but I am too > > lazy to move the gnomon to the correct date whenever I want the time. > > > > I am guessing that the gnomon would have to be figured to an > > analemmic shape or half-analemmic shape that is flipped twice a year. > > > > I would greatly appreciate your help. > > > > Regards, > > > > Bill Price > > [EMAIL PROTECTED]
Pete Swanstrom, I looked at your page with your sundials and I like them. They are very nice examples of what one can make. But I have some remarks about the names of the dials used in the e-mails about this subject. Bill Price started with a question about an "analemmic" dial of which he has "both an elliptic and a Lambert dial", as he wrote. These are dials with movable gnomon. Analemmatic is a better word for this type of dials, as usual in gnomonics. Pete Swanstrom however shows us 2 equatorial sundials with a corrector for the equation of time, but these aren't analemmatic dials as Bill's. In English the word analemma is used for the 8-shaped curve as Pete's corrector shows and so we have some confusion in all the e-mails. To make it even more complicated, Vitruv already used the word analemma for a construction methode to lay out sundials ( and to solve many more problems ) Also Bill asked for a dial with no moving part. He was to lazy ( as he wrote himself ) to move the gnomon. And the dials of Pete have a movable part. The 8-shaped part must be rotated to a right position related to the sun. Bill already has an answer to his question. In a recent bulletin of the BSS an article of an analemmatic sundial with non-movable gnomon is published. Well, there was some confusion in these e-mails, but I liked to read them and I am glad I could see the dials of Pete. Happy dialing to all, Fer de Vries, Netherlands.
