Sunny Day Duane? As you suggest it is possible to incorporate the Equation of Time into a garden variety horizontal sundial. However it must be done to each individual hour line in the form of an analemma, which is in the shape of an "8". If used, it is normally done only on the full hours. I am sure you have seen this. I many cases the graph of the Equation of Time is included in the dial plate. When reading the sundial the graph is used to estimate the correction required on a particular day. You can see this at:
http://www.mysundial.ca/sdu/sdu_correct_a_dial_2.html There is a more complex horizontal sundial that will indicate standard time. Happy Dialling! Carl Sabanski www.mysundial.ca "Get Hooked on Gnomonics!" -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Friday, June 01, 2007 2:57 PM To: [email protected] Subject: Equation of Time Greetings, I am a new member and have what is probably a very simplistic question. My apologies in advance. When considering a flat, fixed sundial (not an equatorial dial) it appears that to get the sundial as close as possible to watch time you set it to the latitude and then adjust it for the longitude when laying out the hour lines. Having done all that, am I right in assuming that you are still at the mercy of the Equation of Time and will need to add/subtract minutes to the dials time to equal watch time? - or is it somehow possible to adjust a flat, fixed sundial to incorporate the equation of time also? Thank you for any guidance/help you will tender. Sincerely, Duane Thomson ---------------------------------------------------------------------------- -- See what's free at AOL.com.
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
