June 2021
Page 37

BSS Zoom Event: 17 April 2021, 16:00 UTC

Report on the British Sundial Society's successful virtual conference held via Zoom in April 2021, featuring three noted North American speakers. Talks covered Zarbula and Potey dials in the French Alps, a highly customized ceiling reflection sundial by Woody Sullivan, and Fred Sawyer's theoretical work on Hybrid Peaucellier azimuthal dials designed to eliminate the noon gap.
Dials: Reflected, Mathematics of Dialling, Sundial Design & Layout, The BSS and Members

Fred Sawyer
Frank King
Roger Bailey
Woody Sullivan

September 2017
Page 2

Modern Observations using the 1702 Meridian Line of the Basilica of Santa Maria degli Angeli e dei Martiri (Rome)

This article is based on a 2016 conference talk detailing modern observations of solar transits on Rome's 1702 meridian line. The purpose was to determine the obliquity of the ecliptic, length of the year, and time of vernal equinox. Analysis of 54 data points gathered between 1996 and 2015 confirmed that the obliquity has grown smaller since the line's construction.
Dials: Noon Lines, Historical Dials, How Sundials Work, Mathematics of Dialling

Woody Sullivan
Mallory Thorp
Guadalupe Tovar
Jennifer Look

September 2006
Page 109

Readers’ Letters

This section features diverse reader contributions. Topics include an anticlockwise convention for Roman numerals on old dials, warnings about Pearson-Page sundial replicas that can cause historical errors, the disappearance of a modern sundial at St. Gregory’s Minster, and a sceptical view on theories regarding continental cathedral meridian lines.
Historical Dials

J. P. Lester
Mike Cowham
Woody Sullivan
Roger Bowling