December 2003 page 144
John Singleton
Barrie Singleton

The Druid

An account of the conception and development of a helical sundial known as 'The Druid', highlighting the innovation of the 'Smart Shadow' and construction techniques.
Dials: Unusual, Sundial Design & Layout, DIY Sundial Projects

September 2001 page 130
John Singleton

A Horizontal Dial for the UK

This article presents the design for a horizontal sundial usable anywhere in the UK to show GMT, requiring only a slight tilt adjustment for specific latitudes. It employs a gnomon rod mounted at a 53-degree angle and concentric circles on the dial plate represent different longitudes. A formula for calculating hour lines is provided.
DIY Sundial Projects, Dials: Horizontal, Mathematics of Dialling, Sundial Design & Layout

February 2000 page 51
John Singleton

A Horizontal Dial with Equation-of-Time Built In

Describes the construction and principle of a horizontal dial that incorporates the equation of time.
DIY Sundial Projects, Dials: Horizontal, Equation of Time

June 2000 page 103
John Singleton

A Portable Analemmatic Dial

Design and rationale for a moveable analemmatic sundial suitable for demonstration or travel.
DIY Sundial Projects, Dials: Analemmatic

February 1999 page 49
John Singleton

A Fixed Pillar Dial

This article describes a fixed pillar dial, a variant of the Shepherd's Dial, which indicates time without requiring cylinder rotation. It features a radial gnomon whose tip's vertical shadow length and position on the cylinder's wrapped surface (calibrated by specific formulas) distinguish morning from afternoon.
Sundial Design & Layout, Dials: Cylindrical

February 1998 page 26
John Singleton

Analemmatic Dial with a Fixed Gnomon

Proposes an analemmatic dial that retains a fixed upright gnomon by drawing a series of ellipses, scaling and shifting them to avoid crossing lines and confusion when reading it.
Dials: Analemmatic, Mathematics of Dialling, Sundial Design & Layout

June 1998 page 38
John Singleton

Reclining and Declining Dials

This article provides a straightforward set of equations for the design of sundials that simultaneously recline from the vertical and decline from the south. It revisits the formulas for vertical declining dials and demonstrates how these two types of tilts combine to derive effective values for both angle and declination.
Dials: Vertical, Mathematics of Dialling, Sundial Design & Layout

July 1997 page 50
John Singleton

Diallists' Crossword

A themed crossword puzzle for members of the British Sundial Society.

October 1997 page 21
John Singleton

Folded-H Polar Dial

This article introduces a one-piece polar dial that can be cut from metal or card and folded to form a square box. Its outer limbs serve as gnomons and legs, with one gnomon for before noon and another for after. The design ensures the dial is inclined at the angle of latitude, and it operates on the same principle as the portable polar dial, with considerations for GMT hour marks at different longitudes.
DIY Sundial Projects, Dials: Polar, Dials: Portable