you can have a transparant dial. look at:
http://www.advanceassociates.com/Sundials/Stained_Glass/sundials_EGP.html
dial 8 or 50.
They are created on the window and have a fixed reading point on the floor.
Thibaud
At 02:20 03-09-2008, Rodney Heil wrote:
-- Forwarded message
Hi Patrick,
Unlike the mirrored dial that John refers to, yours doesn't have a gnomon, I
think.
Just a guess, but is it using polarisation? In your photographs the '6'
panels seem darker than the others, so I'm wondering if the tear-shaped
panels are polarised.
Could it be a sundial that can be
Hi Patrick,
This device obviously is a Wheatstone folding-type polarization
sundial. See Allan Mills' article The sellotape sundial in BSS
Bulletin 98.1, p. 3-9, especially figure 7.
Best regards,
FRans Maes
Patrick Powers wrote:
Can anyone throw light on the interesting device to be found
Dear Roger,
I forgot earlier to comment on one line of yours.
The later Braunschweig sundial, 1346 perhaps, represents a seismic
shift in the understanding time and the universe. The angles on this
dial are correct for a polar gnomon and would show equal time throughout
the seasons. This
If instead of sun-gnomon-shadow you want a little shade, you might consider one
of Claude Hartman's
south facing Stained Glass windows which use an awning with a slit aimed at the
north polar point.
You then have a bar of light rather than a shadow indicating time.
Fritz
-Original
Here are an explanation of the unknown / Known sundial
http://www.montgomerycollege.edu/Departments/planet/planet/Polarization_sundial.ppt
G. Bellina
Frans W. Maes wrote:
Hi Patrick,
This device obviously is a Wheatstone folding-type polarization
sundial. See Allan Mills' article The
