🚀 go-pugleaf

In article <1993Jan5.074039.13915@organpipe.uug.arizona.edu>
tip@lead.aichem.arizona.edu (Tom Perigrin) writes:

>The reason is simple...   the gnomen parallels the axis of rotation (on a 
>good sundial, as opposed to a cheap KMart blue light special).   Since
>the earth rotates 15 degrees per hour, we could theoretically make a 
>dial by wrapping a cylendar around a gnomen, and marking it every 15 degrees.
>The shawdow will move with a constant velocity of 15 degrees every hour, no 
>matter what time of year.

Well, almost.  Let's not forget atmospheric distortion as the sun approaches
the horizon (daylight hours at the equinoxes on the Equator last more than 12
hours, because of refraction with the atmosphere).
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Lyle H. Gray                       Internet (personal): gray@cs.umass.edu
Quodata Corporation            Phone: (203) 728-6777, FAX: (203) 247-0249
--(My opinions are my own, and do not represent my employer's opinions)--