Show them sundials that can be explained to them. I think that people will like something better, enjoy it more, if they know how it works.
As much as I like the Analemmatic Dial, I prefer (at least at first) showing people sundials that they'd be willing to listen to an explanation of. ...or dials whose explanation is brief. So, that would rule-out the Analemmatic, and declining flat dials, and altitude dials. The Horizontal Dial, closely derived from the Equatorial Dial, has a brief and intuitive explanation. Likewise the South Vertical Dial, the Polar Dial, and any north or south Reclining Dial. (They're like Horizontal Dials for different latitudes). (They could be summarized as any dial whose plate's normal is in the plane of the meridian). Of course the Equatorial Dials are the most obvious and natural of all, not really requiring explanation. (By "Equatorial", I mean any dial that directly shows a shadow's or lightspot's movement around the equatorial plane by uniformly-spaced marks around a circle in that plane) My favorite for a south windowsill is the Circumference-Aperture Cylinder-Equatorial, but I'd want to include, with it, at least a *description* of the geometric demonstration of its principle. (My girlfriend doesn't care for geometry or math, but she's going to hear about the geometry of a Circumference-Aperture Cylindrical-Equatorial.) Declining flat dials, altitude dials, the Analemmatic Dial, and the Circumference-Aperture Cylinder-Equatorial are good ways of inspiring interest in, and demonstrating, some geometry or astronomical mathematics. Emphasize to the person, that those subjects are relevant and interesting, and useful. It seems to me that those dials would be especially a good idea for school math classes, or for when someone's child is taking such courses. Michael Ossipoff On Sun, Nov 5, 2017 at 10:46 AM, Dan-George Uza <cerculdest...@gmail.com> wrote: > Hello, > > I am looking for titles of sundial books for children. I particularly > liked Annos sundial pop-up book by Mitsumasa Anno. Also, I would like to > know some of your experiences in working with kids. What do you think is > the best approach to teach 10 year olds about sundials? > > Regards, > > Dan Uza > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > >
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