Judith,
Go to everyone's favorite search engine, Google.com, and enter "magnetic declination" (or "magnetic variation") and you'll find more information, both text and graphic, than you can possibly browse through before the end of this decade!
Cheers, Mac Oglesby
We all know that "True North" (Polaris) is not the same as "Magnetic North" when orienting a sundial. My grandfather's Boy Scout pocket "Sunwatch" is a true gem for our family -- loaded with information for any enthusiastic sundial traveler (complete with a compass, dial, and table of corrections for the major US cities). One of the corrections included was for "Degree Variance" (East or West) of magnetic north in which to point the dial to "True North" for an accurate reading. For example, Boston, MA is 14 degrees West; Seattle, WA is 23 degrees East; and ironically, Cincinnati, OH has no variance and is the same as magnetic north. Is anyone in the mailing list aware of the mathematical formula used to compute this variance for True North? Judith Romano mailto:[EMAIL PROTECTED] -
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