The leading world Internet site on sundials, including sundial makers, books, journals, Sundial Trails all over the world, national societies, sundial projects, and many pictures of sundials.

The NASS site has information on sundials, links, a register of dials and a sundial message board.

The British Sundial Society's home page.

PRIME NRICH PLUS Analemmatic sundials: How to build one and why they work Have we caught your interest Chaos in Numberland: The secret life of continued fractions Fractal expressionism Recent NRICH Articles Gold for Goldbach Prehistoric printer Old problem, new spin Recent NRICH news Puzzle page Mystery mix Opinion Letters About Plus Support Plus Book reviews Features index Interviews index ...

Sundial Information Parts of a Sundial: Gnomon: The shadow caster, in a horizontial dial the angle phi is equal to the Latitude of the location. Hour Line(s): The numbered lines that the shadow falls along. Nodus: A marker along the gnomon to get an exact point on the shadow. Furniture: Lines and functions other than the Hour lines, usually date lines (this is what the nodus is for). Common ...

Links Sundial Tour (Next) Sundial Pages Sundials Calendar Reform Poetry Ptolemy Sacrobosco General Pages Home Index Sundials 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. However, by the middle of the ...