Page 91

Vial Dial

Description and design of an equatorial ‘vial’ ring dial that combines a planisphere with a sundial. Uses a spirit-level alidade and a rotating outer ring to read local apparent time for any longitude, and to estimate sunrise, sunset and the locus of solar midnight across longitudes.
Dials: Equatorial, How Sundials Work, Sundial Design & Layout

Heiner Thiessen

Page 96

Restoration of the Houghton Hall sundials — a study in patience

Account of discovering four large vertical dials on an octagonal cupola, surveying gnomon positions, choosing vitreous-enamel steel faces, manufacturing setbacks (overseas enamelling) and the final installation with alignment and conservation choices.
Dials: Multi Faced, Dials: Vertical, Restoration projects

John Davis

Page 100

From the Register

Selections from the BSS Register highlighting notable dials (examples from Suffolk), with location, brief technical notes and historical context for each featured entry.
Historical Dials, The BSS and Members

Page 101

The vertical sundial of Saint Lavrentios Convent

Study of a white marble vertical dial set into the south wall of the convent church: description of its semicircular plate, upside-down placement, ancient Greek numerals and discussion of likely origins (reuse from earlier Latin/antique fabric or a Byzantine installation).
Dials: Vertical, Historical Dials

E. Th. Theodossiou
Y. Kouris
V. N. Manimanis

Page 103

A sun and moon dial with Babylonic and Italian hours

Description of a multi-plane stone dial ensemble that shows Babylonian and Italian hours by day and acts as a moon dial at night; discusses decorative Earth/moon motifs, orientation relative to local and Basel reference planes and how the lunar readout is used.
Dials: Horizontal, Dials: Unusual, How Sundials Work

Karl G. Hofbauer

Page 105

Restoration of the sundial on Market Lavington Church

Conservation report for an east-declining carved sandstone dial: cleaning, uncovering original fixing holes, mortar repairs, paint-infill of hour lines and fitting a new brass gnomon; includes measured declination and assessment of layout inaccuracies.
Dials: Vertical, Historical Dials, Restoration projects

Harriet James

Page 110

Joseph McNally’s slate sundials

Survey of Joseph McNally’s early 19th-century slate dials (mainly Portaferry area): characteristics of multiple-gnomon plates, chapter rings with alternate longitudes, mottos, colouring evidence and the regional slate-working/dial-making context.
Dials: Vertical, Historical Dials

John Davis
Michael J. Harley
Harriet James

Page 116

Book review — Sundials

Review of C.St.J.H. Daniel: Sundials: scope, illustration quality, intended audience and strengths/weaknesses for both newcomers and diallists.
Book Reviews

Page 118

Equatorial sundial unveiled by the Queen

Report of a ceremonial unveiling of a new equatorial sundial: description of the dial type, event context and public/promotional aspects of the installation.
Dials: Equatorial, The BSS and Members

Doug Bateman

Page 120

An Austrian visit and two rather doubtful dials

Travelogue describing a visit to several Austrian dials and analysis of two questionable/atypical examples.
Dials: Vertical

Mike Cowham

Page 122

Where is the Sun?

Technical article on computing the Sun’s position for dial work: includes input/output examples (SUNAZALT style), azimuth/altitude tables and worked examples relevant to gnomonic layout and correction calculations.
Mathematics of Dialling

Gordon E. Taylor

Page 124

The cylindrical box of Antoninus Pius — Part 1

Analysis of the small Roman bronze ‘cylindrical box’ with pierced disks in Vienna; interprets the object as a portable/rolling sundial (viatoria pensilia), applies Padre Secchi calculations and discusses mounting/suspension possibilities and function.
Dials: Portable, Dials: Unusual, Historical Dials

P. A. Auber