My book, Illustrating Time's Shadow, is now free on.. www.illustratingshadows.com
And covers hDial declination lines, and several ways of drawing them. Simon On Fri, Nov 15, 2019, 07:49 Michael Ossipoff <[email protected] wrote: > > Is there an easy explanation/derivation for the solar-declination lines on > a Horizontal-Dial? I mean, easiness comparable to that of the > declination-lines for a Polar-Dial or a Tube-Dial (Circumference-Aperature > Cylindrical-Equatorial Dial)? > . > The explanation for the Horizontal-Dial's hour-lines is brief enough, but > its declination-lines seem to need a considerably longer explanation. > . > I ask that because, to offer or suggest a sundial or map-projection, or to > set up a sundial for others, I prefer one that's easy to explain. It seems > to me that people would like something better if it can be explained to > them, preferably without their having to listen to an long explanation. > . > Week 47, Friday > November 15th > 1450 UTC > . > Michael Ossipoff > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > >
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