This section contains a variety of articles on the theory of dialling. It includes a tutorial section on how dials work, the comprehensive BSS Sundial Glossary, contributions from members (more always welcome) and links to other societies and dial-related web sites.

The BSS Sundial Glossary

Construction of Sundials via Vectors

KING, Frank
The Gnomonic Cipher
Notes on Spherical Triangles
The Queens’ Dial – Refurbishment Considerations
The Shadow of a Point cast onto a Plane
The Angles of the Time Lines on a Sundial
Scaling the Universe via a Transit of Venus

MOSS, Tony
How Sundials Work

Web links
Links to other societies and dial-related web sites