March 2009 page 18
Ken Head

Construction of my Lawn Analemmatic Sundial

This article provides practical details for designing and constructing a durable lawn analemmatic sundial using readily available materials. It covers establishing the north-south line, calculating dimensions, making hour markers from tree-trunk lengths, crafting a date scale from timber, and ensuring precise installation for accurate solar timekeeping.
Dials: Analemmatic, Sundial Design & Layout, Construction Projects, DIY Sundial Projects

March 2008 page 13
Graham Stapleton
John Moir
Ken Head
George White

Readers’ Letters

A collection of letters. Graham Stapleton suggests new glossary terms; John Moir corrects a previous 'Almost Sundial' entry; Ken Head clarifies how to use analemmatic dials; George White discusses the Bath Tompion dial and its uncertain link to the Pump Room clock.
Dials: Analemmatic, Dials: Portable, Historical Dials

December 2008 page 160
Ken Head

Analemmatic Dials—Design Data

This article provides a summary of data and equations needed to delineate and set out analemmatic sundials. It discusses the projection of an equatorial dial onto a horizontal surface, using a vertical gnomon whose position varies with the sun's declination, and the calculation of sunrise and sunset markers using Lambert circles and Bailey Points.
Dials: Analemmatic, How Sundials Work, Mathematics of Dialling, Sundial Design & Layout

March 2007 page 46
Ken Head

Orientation of St Mary’s Church, Stoke D’Abernon, Surrey

This article re-examines the orientation of St Mary’s Church, Stoke D’Abernon, considering the 7th-century Saxon church and its 13th-century chancel misalignment. It calculates sunrise azimuths for the Feast of the Annunciation, accounting for horizon elevation and atmospheric refraction, to explore the hypothesis that church alignment relates to sunrise on the patron saint's day.
Historical Dials, How Sundials Work

June 2007 page 78
Ken Head

Sunrise and Sunset Hours on a Garden Analemmatic Dial

This article discusses the determination of sunrise and sunset directions and times using garden analemmatic sundials. It explains the dial's principles, the Bailey points for seasonal markers, and evaluates the accuracy of these markers, noting discrepancies and suggesting practical applications for garden dials despite minor errors.
Dials: Analemmatic, How Sundials Work, Mathematics of Dialling, Sundial Design & Layout

December 2007 page 173
Frans W. Maes
Roger Bailey
Frank King
Ken Head
J. P. Lester
Malcolm Barnfield

Readers’ Letters

This section contains various letters from readers. Frans W. Maes discusses Lambert circles and seasonal markers on analemmatic sundials. Roger Bailey provides corrections and recommendations for seasonal markers. Frank King confirms a relationship for seasonal marker distance. Ken Head replies to Maes and Bailey. John Lester solves the mystery of a partial sundial motto. Malcolm Barnfield describes the making of a noon cannon sundial.
Dials: Analemmatic, Sundial Design & Layout, DIY Sundial Projects, The BSS and Members

September 2006 page 118
Ken Head

A Home-made Vertical Declining Dial

This article recounts the personal project of designing and constructing a vertical declining sundial for a golden wedding anniversary. It details the use of both graphical and computational methods for accurate delineation, the choice of materials, the incorporation of a brass heart-shaped nodus, and discusses the dial's performance and an inscribed motto.
DIY Sundial Projects, Dials: Vertical, Mottoes, Sundial Design & Layout

March 2005 page 21
Ken Head

Further Comments on the Sundial of St. Mary’s Stoke D’Abernon, Surrey

Reassesses the original Anglo-Saxon sundial at St Mary’s, Stoke D’Abernon through newly discovered early photographs. Reveals the dial’s inclined face, previously unrecognized, and reviews past interpretations. Discusses typological features of Saxon angled-gnomon dials, date uncertainty, and implications for correct dating and classification.
Dials: Vertical, Historical Dials

June 2005 page 58
Ken Head

Equatorial Sundial by Lake Como, Italy

Report on an equatorial sundial in Domaso, Lake Como. Describes its construction, inscriptions, and unusual alignment to indicate clock time (at noon, inaccurate at other times) rather than true solar time, with observations of performance and speculation on design choices.
Dials: Equatorial, Historical Dials

September 2005 page 104
Ken Head
Michael Lowne
Ian R. Butson
Graham Stapleton

Readers' Letters

Contains a series of letters from readers. Topics include a discussion on whether two shadows from the sun and moon can be seen simultaneously, a stained glass sundial in a church, and the origins of an equation of time table.

June 2004 page 63
Ken Head

A Pair of Dials in Vendome, France

Report on two unusual dials above the doorway of Vendôme’s museum, one a vertical sundial and the other with a noon line with analemma, with observations on possible missing features.
Dials: Vertical, Historical Dials

June 1999 page 104
Ken Head

Derivations

This technical article provides formulas for the Equation of Time and the Sun's declination throughout the year, using the day number as a variable. The derived values are shown graphically and noted to be close to published tables, aiming to provide a clear understanding of these fundamental gnomonic concepts.
Equation of Time, Mathematics of Dialling

October 1999 page 107
Ken Head

The Sundial of St Mary's Stoke D'Abernon, Surrey

This article discusses the sundial at St Mary's Church, Stoke D'Abernon, a 7th-century Saxon church. It details the 1933 remaking of the dial after a fall, based on pre-Conquest prototypes shown in 19th-century sketches. The current replica is believed to be unique as the only known Saxon dial replica on a church wall in the UK, with markings consistent with an octaval system.
Dials: Mass Dials, Historical Dials, Restoration projects