This family divides into 4 subclasses. The Curve is - in all cases - a representation of the analemma. (see page 'Displaying the Equation of Time'). All, except Spider Dials, require a nodus or a point gnomon. They are the commonest and easiest-to-make equation-corrected sundials. The Equation of Time is usually combined together with the longitude correction.
FULL ANALEMMAS
(see also Noon Marks, below)
Rafel Soler i Gaya -1988 - Port of Tarragona, Catalonia
J Girbau - 1989 -Castelifollit de la Roca, Catalonia
Harriet James www.sunnydials.co.uk : East/West Vertical Declining Dial
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HALF ANALEMMAS
These are easier to read than full analemmas, but either required the biannual change of the dial plate, as in the first two examples or two separate dials
Ferguson Solar Chronometer - for use by Victorian travellers & explorers. Picture from Musée de la Vie Wallonne, Liège
Detail from Ferguson Solar Chronometer
Christopher St. J. H. Daniel - 1977 - Dolphin Dial, Royal Observatory, London
Detail from the Dolphin Dial
Albin Hoffmann - 2007 - www.precisionsundials.eu - Bütgenbach-Belgium
Sir Mark-Lennox Boyd & Ben Jones www.benjonessundials.co.uk - 2004 - Rosemoor Garden, Devon, UK
? Guiseppe Mara ? & ? Renaudi ? - 1997 -Chiusa di Pesio Nr Turin
W.F. Ng - 1986 - Magdalene College, Cambridge
Sir Mark Lennon-Boyd & Fergus Wessel - 2013 - Obelisque Dial, Egyptian Garden, Buscot Park, Oxfordshire
Detail from Obelisque Dial
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NOON MARKS
These a subclass of the Full Analemma Class - but were often used to set church clocks.
Urbain Adam - 1866 - Cathedral of St. Martin, Colmar, France
Christopher Daniel - 1995 - Radcliffe Observatory, Oxford, UK
Dr Alan Mills - 2007 - Eye of Time, Leicester University, UK
Dr Frank King - 2004 - London Stock Exchange, UK
Detail from Stock Exchange Dial
Alastair Hunter - macmillanhunter.co.uk - 2011 - Noon Mark
Vic McGrath - after 2001 - Smooth Sailing, Reconciliation Place, Canberra, Australia
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SPIDER DIALS
These require a lot more calculation to delineate, but are used with a standard gnomon. A nice feature of the spider dial is its ability to indicate sunrise and sunset times
Mac Oglesby - 2002 - Vertical Declining "Rainbow" Spider Dial, Brattlesbury, Vermont, USA
Mac Oglesby - Monofilar Standard Time Polar Dial
Rick Twardy - 2001 - Parkes Observatory, Dubbo, New South Wales
Author's bronze Highfield House dial - 2016 - before being exposed to the atmosphere
Highfield Dial after tow years in the atmosphere
How to read a Spider dial.
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