Thread: The Math involved.
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Old 16-12-2020, 11:52 AM
rrussell1962
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rrussell1962 is offline 		 
Join Date: May 2014
Location: Brisbane
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Patrick Moore's Astronomy for O Level book had an easy to follow plan for making a sundial which I used to chart the equation of time when I did the O Level many years ago. They should be online somewhere.
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