Op 5-nov-2017, om 18:01 heeft Paul Ratto het volgende geschreven: In message < CAOKDY5BEuyemogJFtQo7whmUOEJ+NtimX7mgwRJ5MpW1tjAP=w...@mail.gmail.com> Michael Ossipoff < email9648...@gmail.com> wrote: 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
Although I am not aware of Sundial books written SPECIFICALLY for children, several (mainly Analemmatics due to their 'interactive' nature) are certainly featured within some School-books - and you could view examples at website: www.sunclocks.com/data/school.htmIf you want to interest children in the subject of Sundials - then I suggest that you visit some Schools and give a 'presentation' to them - as in the attached photograph, showing Slaven Licina giving such a talk. You can visit his own website at: www.suncanisat.comRegards, Paul Ratto.
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
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