Sundials Locationless (Reverse) Cache
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To log this Cache:
Find a Unique Sundial (no backyard garden variety or mass produced examples will be accepted)
Take a picture with your GPSR in the picture
Post the picture and coordinates
Give some history on your find
Canada's largest sundial is located at Bud Miller Park Alberta.
Sundials are perhaps the most ancient of scientific instruments, and the earliest known form of time-keeping. They probably started life as poles in the ground with the direction and length of the shadow giving an approximate time of day.
It was not until around the first century A.D. that it was demonstrated that a gnomon set parallel to the Earth's axis would cast a shadow in the same direction at the same time every day of the year.
Some Types of Sundials
Analemmatic
Reflected ceiling
Polar
Equatorial
Horizontal dial
Vertical direct north sundial
Declining sundials
Portable dials
To assist the Sundialists that watch this page could you please
Include photos of the GPSr showing:
Location
Time (compared with sundial time)
To sundialists the comparision
between solar time (sundial time) and standard time is invaluable for determining if the sundial was
properly designed.
Some interesting links:
North American Sundial Society
Additional Hints
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Treasures
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