Re: Bailey Point Functions

[John Carmichael]

Thanks Roger for getting that drawing to the group.  I think it really helps to explain the Bailey Points functions. John   John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA   Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com> ----- Original Message ----- From: k_man ayuz To: sundial Sent: Saturday, October 26, 2002 9:53 AM Subject: Re: Bailey Point Functions I can't see the picture.   ----- Original Message ----- From: John Carmichael Sent: Saturday, October 26, 2002 11:13 PM 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 Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com