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Bob and all,
As I told before when I
sent the link with the sunny picture, we can see that the hour lines (cables) are not at the
right place : they point to the base of the perpendicular gnomon.
It's the "sundial of an
artist"
For those who understand
French, I can show another example of "sundial of an artist",
it's an
analemmatic dial but with only one point to be all year long, so it works
only 2 days a year !
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