March 2012 page 34
Malcolm Barnfield
Ian R. Butson
Graham Aldred

Book Reviews

This section contains three book reviews: "The Bagnold Sun-Compass: History and Utilization" by Kuno Gross, "Essex Sundials" by Peter Meadows, and "A Dial in your Poke: A Book of Portable Sundials" by Mike Cowham, offering insights into each publication.
Book Reviews

March 2008 page 17
Graham Aldred
Tony Ashmore

Book Reviews

This section reviews 'Biographical Index of British Sundial Makers from the Seventh Century to 1920 (2nd Edition)' by Jill Wilson, praising its enhancements, new names, and comprehensive scope beyond simple indexing. It also reviews 'The Astrolabe' by James E. Morrison, highlighting it as a much-needed, comprehensive guide to astrolabe design, function, and construction.
Dials: Astrolabe, Book Reviews, Historical Dials

March 2008 page 18
Graham Aldred

The Jamestown Commemorative Sundial

Describes the design, creation, and dedication of a large horizontal sundial by Tony Moss, commemorating the 400th anniversary of the Jamestown settlement. The unique 'navette' shaped dial incorporates Anglo-American symbolism, funded by the Sawyer Dialling Prize and sponsors, and was installed at Turner Farm Park.
Dials: Horizontal, Sundial Design & Layout, Construction Projects, The BSS and Members

March 2008 page 22
Graham Aldred

The 13th NASS Conference—a personal report

A personal report on the 13th NASS Conference in McLean, Virginia, covering presentations on various sundial topics, a bus tour to significant dials like the Lyman Briggs Memorial Dial and the Gaithersburg Latitude Observatory, and the dedication of the Jamestown Commemorative Sundial. It also details the Sawyer Dialling Prize presentation and practical workshops.
Dials: Horizontal, Dials: Polar, The BSS and Members

September 2008 page 123
Graham Aldred
Celia James

An Analysis of the Vertical Equiangular Sundial

This paper provides a mathematical analysis of James Richard's rare vertical equiangular meantime sundial, designed to resemble a clock with equally spaced hours. It explains the gnomon's upward inclination and daily displacement, allowing for mean time and BST adjustments. The analysis, an alternative to Foster-Lambert theory, aims to stimulate interest in this unusual dial type.
Dials: Foster-Lambert, Dials: Vertical, Mathematics of Dialling, Sundial Design & Layout

December 2008 page 193
Val Cowham
Janet Jenkins
Graham Aldred
Doug Bateman
Fred Sawyer
Don Petrie
Gillian Nicholson

BSS Sundial Safari to the Alsace, 6-10 September 2008

A report on the BSS Sundial Safari to the Alsace region of France, detailing visits to various towns and villages. It describes numerous sundials encountered, including those at Strasbourg Cathedral, Soultz, Guebwiller, St-Marc convent, Colmar, Eguisheim, Riquewihr, Bergheim, Mont Ste-Odile (featuring a polyhedral dial), and Freiburg (Germany), as well as the Kirschgarten Museum in Basel.
Dials: Vertical, Dials: Multi Faced, Historical Dials, The BSS and Members

September 2007 page 98
Graham Aldred

A Review of the Heliochronometers by Pilkington & Gibbs: Pt. 4. The Mechanical Equation Table

This article reviews Pilkington's Mechanical Equation Table a device for converting sundial time to mean time, detailing its two versions. It covers the design evolution, Pilkington's reluctant use of Gibbs' cam mechanism due to practical limitations, and their patent disputes.
Equation of Time, Dials: Heliochronometer

September 2007 page 111
Robert Scott Simon
John Wall
Graham Aldred

Readers’ Letters

This section features three letters: Robert Scott Simon identifies a dial he made. John Wall comments on a bizarre sundial plot in a TV series, where a pivoted gnomon reveals gold. Graham Aldred discusses corrosion on sundial plates and P&G heliochronometers, suggesting material substitutions and their implications.
Dials: Heliochronometer, Restoration projects, The BSS and Members

June 2006 page 91
Graham Aldred

A Review of the Heliochronometers by Pilkington & Gibbs: Pt.1 - The Design and Accuracy of the Gibbs Helio-Chronometer

This first part of a review examines the design and accuracy of the Pilkington & Gibbs Helio-Chronometer, an equatorial sundial known for its mean time accuracy. It details the instrument's components, mounting assembly, sight screen system, and the mechanism for integrating the Equation of Time using a cam, and discusses factors affecting its long-term accuracy, such as wear and calibration.
Dials: Heliochronometer, Equation of Time, How Sundials Work, Sundial Design & Layout

September 2006 page 128
Graham Aldred

A Review of the Heliochronometers by Pilkington and Gibbs - Part 2, Procedures for setting up the Helio-Chronometer

This article provides comprehensive, practical procedures for calibrating and reinstalling Pilkington & Gibbs Helio-Chronometers. It covers essential steps such as precise levelling, accurate co-latitude setting, meridian alignment, and adjustments for the equation of time and longitude, offering detailed guidance for both Northern and Southern Hemisphere models, aimed at owners and restorers.
Dials: Heliochronometer, Equation of Time, Restoration projects, Sundial Design & Layout

December 2006 page 186
Graham Aldred

The Helio-Chronometers from Pilkington & Gibbs: Pt. 3

Graham Aldred reviews the Sol Horometer, William Pilkington's 1912 heliochronometer, developed to bypass George Gibbs's patent. It details Pilkington’s unique EoT adjustment mechanism, contrasting it with Gibbs's system, and discusses manufacturing, sighting, and pointer design. The article also compares its performance and rarity to the original Helio-Chronometer, noting the limited sales.
Sundial Design & Layout, Equation of Time, Historical Dials, Dials: Heliochronometer

December 2005 page 160
Graham Aldred

The Lyme Hall Horizontal Equinoctial Sundial

This article details the discovery and reconstruction of a unique 1683 combined horizontal equinoctial sundial at Lyme Hall. The author describes deciphering the inscription "R Legh 1683," examining its robust bronze construction and innovative two-hole sight/screen system. The article also explores the dial's historical context, its owner Richard Legh, and a possible link to George Gibbs's Helio-Chronometer.
Dials: Equatorial, Dials: Horizontal, Dials: Unusual, Historical Dials, Restoration projects, Sundial Design & Layout

February 1999 page 23
Graham Aldred

The Holehird Helio-Chronometer

This article details the restoration and reinstallation of the Pilkington & Gibbs Helio-Chronometer at Holehird. It recounts its history, its protection by a glass bell jar, and the innovative security measures implemented for its current display, allowing it to accurately tell time for another century.
Restoration projects, Historical Dials, Dials: Heliochronometer

February 1998 page 14
Graham Aldred

Dunchurch Lodge and the Heliochronometer

A site note on a heliochronometer at Dunchurch Lodge, describing layout, reading, and mechanical features of this precision time-telling instrument and its context on the estate.
Dials: Heliochronometer, Historical Dials