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JKP, you may also want to look up "analemma". Maybe visit analemma.com. The 
"analemma" is a convenient and formerly very common way of graphing the Sun's 
declination versus the "equation of time" during the year. It looks like a 
narrow figure-eight and used to be commonly drawn on globes, usually in the 
relatively empty part of the globe in the Eastern Pacific.

Incidentally, "equation of time" is an odd, archaic phrase that sometimes 
causes confusion. There's no "equation" here in the modern sense (except to 
the extent that there is an equation for everything). The "equation of time" 
is the difference between Local Mean Time and Local Apparent Time. It tells 
us how late or early the Sun is to the meridian, at the central meridian of 
any time zone. Equivalently, it's the difference between sundial time and 
watch time, again at the central meridian of the time zone, and you will 
frequently see a graph of the EqT affixed to sundials. No better alternative 
expression to "equation of time" has ever caught on, so that's still how it's 
known today.

-FER



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