December 2010 page 12
Doug Bateman

Four Sundials in Adelaide, South Australia

This report details four sundials in Adelaide. It includes the Olde Adelaide Sundial at Carrick Hill House with a unique equation of time reflecting South Australia's time zone, two dials at Seymour College, and an unusual polar meantime dial by Government Astronomer Charles Dodwell in the Pioneer Women’s Memorial Garden.
Dials: Horizontal, Dials: Polar, Dials: Vertical, Historical Dials

December 2010 page 20
Alan Smith

A Very Large Polar Dial in Lalín, Galicia, N.W. Spain, Designed by José Luis Basanta Campos of Pontevedra

This article describes a very large polar sundial designed by José Luis Basanta Campos for a multi-purpose building in Lalín, Spain. The dial is 20m x 10m on a south-facing roof inclined at the site's latitude, with a 3m gnomon. It shows hour lines from 7:00 am to 5:00 pm and lines of declination for the 20th of each month, applied using weather-resistant adhesive plastic.
Construction Projects, Dials: Polar, Sundial Design & Layout

March 2009 page 2
Allan A. Mills

A North-facing Polarization Sundial of Varying Hue

This article explores alternative methods for measuring the sun's position, specifically focusing on a north-facing polarization sundial. It delves into the principles of polarized light from the sky, its application in sundial design using materials like 'Sellotape', and the construction of an experimental translucent equatorial dial that produces varying interference colours throughout the day.
Construction Projects, DIY Sundial Projects, Dials: Polar, How Sundials Work

March 2009 page 14
Allan A. Mills

An Electronic Polarization Sundial and Photometer

This article describes an electronic polarization sundial and sky photometer designed to measure the intensity and polarization of skylight. It uses a rotatable polar and a selenium photovoltaic cell to detect the solar meridian to within ±8 minutes of time and quantitatively assess the percentage of linear polarization in light from a selected area of the sky.
Dials: Polar, How Sundials Work, Construction Projects

June 2009 page 18
Malcolm Barnfield

Sundials within the tropics

An overview of designing and using sundials in tropical regions. It discusses the suitability and challenges of various dial types, including horizontal, armillary, polar, and vertical, noting issues like noon-line crowding on horizontal dials and the advantages of other formats.
Dials: Horizontal, Dials: Vertical, Dials: Polar, Dials: Astrolabe, Dials: Armillary Sphere

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

December 2008 page 154
Mike Cowham

The Universal East and West Polar Dial

This article describes a portable universal East and West polar dial that is self-aligning and does not require a compass. It details its design, operation, and identifies limitations such as a two-hour gap around noon. It also explores improvements through hinged flaps and cylindrical designs, and relates it to other dial types like the double crescent dial.
Dials: Polar, Dials: Portable, How Sundials Work, Sundial Design & Layout

December 2008 page 157
John Davis

BSS Newbury Meeting—27 September 2008

A report on the BSS Newbury meeting on 27 September 2008, detailing talks on stainless steel sundials, polar dials, dynamic sundial design using calculators, and 3-D modelling for overshadowing. It also covers a survey of early horizontal dials in Flintshire, exhibits, and presentations on paper sundials and dials in Mexico and the southern hemisphere.
Dials: Horizontal, Dials: Polar, Sundial Design & Layout, The BSS and Members

December 2008 page 170
Tony Belk

Polar Dials at any Declination

This article presents a method for designing polar sundials for any latitude and declination using four simple formulae. It explains that polar dials have a style parallel with the dial plane and parallel hour lines, and describes how to determine the angle of the equinox line and the sub-style hour angle.
Dials: Polar, How Sundials Work, Mathematics of Dialling, Sundial Design & Layout

December 2008 page 184
Ortwin Feustel

The Logarithmic Spiral as the Basis of a Polar South Sundial

This article proposes the logarithmic spiral as the sole mathematical function needed for designing a polar south sundial, where one spiral segment forms the gnomon profile and another acts as the dial face. It details the spiral's characteristics, equations for tangents and arc lengths, and presents a calculation example for a model, illustrating its construction and operation.
Construction Projects, Dials: Polar, Mathematics of Dialling, Sundial Design & Layout

December 2007 page 153
Doug Bateman

Ben Jones: Letter Carver, Sculptor and Sundial Maker

This report profiles Ben Jones, a letter carver and sculptor based in Devon, who has also become a skilled sundial maker. His work, which comprises 25-30% of his commissions, is noted for its artistic and unique designs, ranging from shield-shaped vertical dials to analemmatic dials and multi-faceted columns. He integrates his lettering skills and sculptural form into his creations.
Dials: Vertical, Dials: Polar, Sundial Design & Layout

September 2006 page 138
Tony Wood

Sundial Delineation Using Vector Methods - Part 5, Polar Dials

The fifth instalment in a series, this article applies vector methods to the specific challenge of delineating polar sundials. It presents the vector components for the shadow plane and declination lines, mathematically deriving the straight hour lines and hyperbolic declination lines.
Dials: Polar, Mathematics of Dialling, Sundial Design & Layout

December 2005 page 172
Doug Bateman

The Cross Dial by C V Boys at the Royal Botanic Gardens, Kew

This article investigates the bronze cross dial by C.V. Boys at Kew Gardens, noting its unusual design and puzzling errors in the engraved latitude and longitude. It traces the dial's history, including its temporary display and previous locations within the gardens, and highlights the scientific reputation of its designer, Sir Charles Vernon Boys FRS.
Dials: Polar, Dials: Unusual, Historical Dials, Sundial Design & Layout

March 2002 page 4
John Davis

An Isaac Newton Sundial

Describes the design and creation of a unique sundial featuring a statue of Newton holding a prism, inspired by his optical work and historic dials at Woolsthorpe.
Construction Projects, Dials: Polar, Dials: Unusual, Sundial Design & Layout

March 2002 page 39
Allan A. Mills

Calendar Dials

Explores dials intended to show the date rather than the time, by reading the shadow of an equinoctial ring on a scale on the stile.
Dials: Polar, Dials: Unusual, How Sundials Work

December 2002 page 146
Doug Bateman

The 'Akeler' Equatorial Dial: Relocated in Marlow

Detailed account of the design, relocation, and symbolism of Edwin Russell’s large equatorial dial now installed in Marlow, including technical specifications.
Dials: Equatorial, Dials: Polar

October 2000 page 107
Piers Nicholson

The Genesis of the Tylers' and Bricklayers' Sundial

Detailed account of the design process and construction of the Tylers' and Bricklayers' polar sundial in London, including technical and logistical challenges.
Construction Projects, Dials: Polar, Sundial Design & Layout

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

October 1992 page 25
H. R. Mills

A Portable Polar Sundial

This article introduces a portable polar sundial design that overcomes the issue of an infinitely long dial face for extreme hour angles. It uses two end-styles, which cast shadows for forenoon and afternoon hours, respectively. The dial can be adjusted using a wedge to correct for the Equation of Time or longitude.
DIY Sundial Projects, Dials: Polar, Equation of Time, How Sundials Work

February 1991 page 6
George Wyllie

A Cross Dial for a Scot.

Describes the design of Cross or Star dials, focusing on the concept of the equatorial notch, which has surfaces parallel to the Earth's polar axis. The shadow cast by the outer edge of the notch onto the opposite surface is used to indicate time. The article provides details on the design and depth required for such dials, noting that each notch effectively functions as a separate dial.
Dials: Equatorial, Dials: Polar

February 1991 page 11
Colin McVean

One Way of Looking at It, Equatorial and Polar Dials.

Equatorial and Polar Dials explores the principles behind these two types of sundials. The article also covers the Equation of Time and how to account for longitude to tell Greenwich Mean Time with a sundial.
Dials: Equatorial, Dials: Polar, Mathematics of Dialling

July 1991 page 8
George P. Woodford

Look at it This Way - Again

This article re-examines plane dials tilted from the horizontal, focusing on clarity, legibility, and environmental compatibility. It explains 'shadow regimes,' how tilt relates to equivalent latitude, and the impact on sun-shadow patterns. Key considerations include local horizons and the 'night factor'—periods where the dial cannot register time. It highlights the clarity of polar regime dials, despite seasonal limitations, for educational and aesthetic purposes.
Dials: Polar, How Sundials Work, Mathematics of Dialling, Sundial Design & Layout

June 1990 page 14
René R.-J. Rohr

A Unique Greek Sundial

This article describes the 1975 discovery of a unique Greek sundial slab at Ai Khanoum, Afghanistan. Dating between 325 and 145 B.C., this polar dial, designed to indicate temporary hours, represents an evolutionary advancement in ancient gnomonics, despite a discrepancy between its marked latitude and discovery site.
Dials: Polar, Historical Dials, Dials: Scaphe