Sundials - 3" to 20" Sundials  Arc & Vernier, 3-Footscrews, Sundials With Compass, Sundials On Wooden Bases / Boxes.

What is a sundial?

Telling time by the sun goes back very far in man's history. More than
3,500 years ago, people realized that the sun could be used to tell the
time of day. As a result, they learned how to construct instruments
called sundials. A shadow cast by the sun pointed to the time of day on
a dial that was part of a sundial. Perhaps the largest sundial ever
built was constructed at Jaipur, India, in 1742.

The pointer of this huge sundial is one hundred feet high, and the whole
instrument covers an acre of ground. Some sundials were small enough to
be carried by their owners, as easily as wrist watches are worn today.

For more than a century after watches and clocks were in use , their
accuracy was checked by sundials. The base of the sundial is called
gnomon (No-mon), which is Greek for "the one that knows."