Louise Rigozzi <[EMAIL PROTECTED]> wrote:
Dear Sundial Mailing List members,
I have just joined the list and have quite a tricky question to ask already! I am working with Tony from Lindisfarne Sundials in England to create a sundial at a very high latitude (78 degrees) and I am including a correction graph for reading from the moon's shadow. This is because for three to four months of the year there will be little or no sun. I have made the graph illustrate the principle that the moon is 48 minutes 'fast' each day before the full moon and 48 minutes 'slow' each day after it. The graph hopefully gives the idea that the more precise you can be with the number of days (and even half or quarter days) you are from the full moon, the more accurate your reading will be. If anyone is interested in seeing it, I can JPEG it to you. My main question is, after adding/subtracting the hours and minutes from the reading of the moon's shadow, whether you then need to add/subtract the minutes according to the Equation of Time (! ! which will also be shown on the dial face) for that day of the year. Thanks! Louise Rigozzi
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Albert Franco
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. . .
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Tis the set of the sails
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Like the winds of the sea
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And not the calm or the strife.
--Ella Wheeler Wilcox
! 1916
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