Re: Strange sundial in China

[R.Pauli]

Perhaps a geometrically convoluted gnomon.

in 1/5/2021 6:23 AM, pol...@sterrenwacht.eu wrote:


Hi group,

I saw this sundial in the Xi'an Mosque in China. Can anyone tell me 
how this sundial worked?


Clear skies, 
Gerard van den Braak
www.sterrenwacht.eu 
www.zonnewijzers-nederland.nl 


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Re: New indoor sundial with lens/mirror

[R.Pauli]

Spectacular! Techno-Modern-Gnomonics.

 Almost a reverse display, instead of shadow, the point of light is the 
display.   Sort of a reflecting gnomon -rather than a shadow.   In my 
translated page it is called a shadow - but should there be a different 
term for a concentrated spot of light? Maybe a 'negative' display?


For the next version, I would want to see a prism that eould expand and 
colorize the light.  Although I am unaware of the challenges of 
deploying glass optics.


Superb design.   thanks

Richard Pauli

On 4/20/2018 6:32 AM, Kurt Niel wrote:

Hi all,

proudly presenting my latest sundial within a primary school here in 
Upper Austria:

https://kepleruhr.at/su-vs-wallern and
https://flic.kr/s/aHsm9EgPtL
Bending mirror because of the narrow lightwell.

Cheers
Kurt
https://kepleruhr.at




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Re: Sundial books for children

[R.Pauli]

Children's tale of  Mr. Stemwinder Finds the Time
Childrens' book written by Stephen Y. Bready, illustrated by Antoinette 
Delaney.- around 1979


   Mr Stemwinder collected clocks... loved to hear them chime on the
   hour and noon and midnight
   But one autumn day he got lost walking in the woods
   He could not return home in time to wind all his time pieces.
   So they all stopped, He could no longer set his clocks, because he
   didn't know the time.
   Distressed that his house was silent of tick-tocks and chimes,
   He went out into his garden to be sad.
   Among the piles of leaves, he sat on what he thought was a bench.
   He sat on a sundial!
   He brushed aside the leaves and let the sun tell him the time.
   That's how Mr Stemwinder found the time.


Story archived at Microsoft at 
ftp://ftp.umh.es/utiles/RESOURCE-KIT/RESKIT-W98/APPS/NETSHOW/gallery/stemwndr/default.htm

ftp://ftp.umh.es/utiles/RESOURCE-KIT/RESKIT-W98/APPS/NETSHOW/gallery/name.htm
Used to showcase early rich media technology using voice synced with images

Lots more text and drawings aimed at youngsters
Out of print -  will see if I can find it.



On 11/5/2017 7:46 AM, Dan-George Uza 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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video Time Lapse Sky Shows Earth Rotating Instead of Stars fixed audio

[R.Pauli]

Same action, different view.

Sort of like having a fixed gnomon shadow and a rotating dial face


Astounding video... great, instructional experience. 
https://youtu.be/IYdl5509IhA



 Time Lapse Sky Shows Earth Rotating Instead of Stars fixed audio

https://youtu.be/IYdl5509IhA

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Re: largest sundial

[R.Pauli]

I heard Bill Nye The Science Guy talk about his father wanting to set 
out marks for the Washington Monument.

Great idea, but the problem was the fuzzy shadow.


On 10/27/2015 3:33 AM, Jackie Jones wrote:


Can someone please tell me what is the world’s largest sundial?   If a 
vertical tower, how high above the ground is the nodus?  I have been 
consulted by someone who is claiming that a tower he wants to use as a 
sundial, which is 162m tall, will be the world’s largest dial.  There 
are many issues with a dial of this size, which will be explained to 
him, but I would like to know about sizes of other large dials, 
please.  This is not just a tall building casting a shadow, but one 
where there are hour markings on the ground.


With best wishes to you all,

Jackie

Jackie Jones

50° 50’ 09” N0° 07’ 40” W



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