RE: Bailey Point Functions

[Roger Bailey]

John's 34 kb drawing didn't make it through the mailing list size filter. I am trying to send a the pdf version that is half the size, 18.5 kb. I hope that it makes it through. If not this is the note without the attachment.   I would be happy to send out copies of the presentation on Seasonal Markers that gave at the NASS Conference in Tucson. The gives the basis for the concept, Mike DeAmicis_Roberts idea, the theory and mathematics, instructions on how to use them, an error analysis, the error compensation epicycle and pictures of the first application, Mike's Seasonal Marker dial. The pdf version of the 40 slides in presentation is about 1.2 MB. The PowerPoint version with notes and pictures is over 6 MB, too large to send as an email attachment. Sorry but I do not have a web site where you could download the file at your convenience.   I will be converting the presentation to an article for the NASS Compendium. It will get published eventually but I am not there yet.   Sometimes this email return address [EMAIL PROTECTED] does not always work so please include a copy of your request to my alternative address [EMAIL PROTECTED] .   Roger Bailey Walking Shadow Designs N 51  W 115 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of John Carmichael Sent: October 26, 2002 8:49 AM To: Sundial List Subject: Bailey Point Functions Hi Heiner:   > Thanks for speedy reply. > Do you have jpeg of the image? > Saw the Bailey Points on your website > and understand the principle of it. > But how do you actually read times for sunrise and sunset? > Is it the time on the Time Ribbon? > Who is this Mr. Bailey? That is incredible. > Do you have more info on the math of it?   Here is the drawing of Roger Bailey's Seasonal Markers and how they function.  Roger is a Canadian member of NASS and is hosting the NASS conference next year in Banff.  He specializes in analemmatic sundials.  Contact him for a mathematical explanation of his Bailey Points. ([EMAIL PROTECTED])   Since some people don't know how the Bailey Points are used to tell the times of sunrises & sunsets, here is a drawing that explains them.  If you stretch a string from a date on the dateline out beyond the Time Ribbon so that it passes through the East Bailey Point (Seasonal Marker), it will tell you the time of sunset on that date. In this drawing, as an example, the purple line shows the time of sunset on Nov. 1.  A similar line through the West Bailey Point will give you the time of sunrise on that date.  Real simple! > >  ----- Original Message ----- > >  From: Heiner Thiessen, > >  To: [EMAIL PROTECTED] > >  Sent: Friday, October 25, 2002 1:52 AM > >  Subject: Your analemamatic > >  Dear John, > >  I visited your website and was very impressed by your > >  beautiful analemmatic dial. You say under 'Functions' that it reads > >  times for sunrise and sunset as well as standard time after > >  adjustment. How does that work? Still learning. > >  Heiner Thiessen > >  51 00 43N > >  00 56 36W