New mexican sundial blog

2006-12-14 Thread Tony Rodríguez
HI there I'm an architect from México and I published a blog of Yucatán sundials, especially those that come from the colonial age. The adress is: http://relojdesolyucatan.blogspot.com/ Some new entries were added, like the sundials of Sn. Francisco Coventry at Oxkutzcab (pretty hard to say

Re: Varying amounts of sundial correction

2006-12-14 Thread Willy Leenders
I think the question is: what is the maximum difference between the time on a clock and the time on a sundial? The maximum difference must be in the west of China (about 74° E). The reference for civil time for China is 120° E. The difference is (120 -74) x 4 + 14 EOT = 198 minutes (3 hours and

Re: Varying amounts of sundial correction

2006-12-14 Thread Frank King
> For example, I think some countries may not subscribe > to the general rule of reference meridians and time > zone division every 15 degrees... It gets even worse than you thought. You can be a whole DAY out... The Line Islands in the Pacific keep their clocks at GMT+14. The International D

Re: Varying amounts of sundial correction

2006-12-14 Thread BillGottesman
I looked this up a long time ago for the continental USA and came up with this info re: the extremes of local time within time zones: EST 75deg. Meridian. Range 15deg. west, 8 deg. east of meridian. CST 90 deg. Range 15w, 5.5e MST 105deg. Range 13.5w, 5e PST 120 deg. Range 5w, 6e. I do not know

Varying amounts of sundial correction

2006-12-14 Thread J. Tallman
Hello All, As I work on several Spectra dials this week I am contemplating time correction. Exclusive of the Standard/Summer time correction, I include longitude correction when laying out my dials, and most dials range between ± 0-45 mins or so based on the offset from the reference meridia