armillary sun dial
Thomas Center
Gainesville, Florida
the garden armillary sun dial works
on the same principle as
the traditional flat sun dial ..
the armillary sun dial has three rings with a sphere
set in the middle ...
spheres represent Equator, Horizon
and Meridian ...
a rod ( gnomon ) that passes through the rings
represents the Earth's axis ...
the gnomon is usually in the shape of an arrow pointing
to the pole star...
the hours are engraved on a curved band
