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](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/7892e6cc-e3b6-4c7e-ba66-a1cc5963c39d_rw_1200.jpg?h=df577c4c78197f5c599031444a073afa)
Rafel Soler i Gaya -1988 - Port of Tarragona, Catalonia
![J Girbau - 1989 -Castelifollit de la Roca, Catalonia](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/a6e05189-cdf4-4447-aa28-8d0b233916e9_rw_1920.jpg?h=66e912934e9cd1564aab0bc6e4808047)
J Girbau - 1989 -Castelifollit de la Roca, Catalonia
Harriet James www.sunnydials.co.uk : East/West Vertical Declining Dial
Click on images to enlarge & view captions
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](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/4dad2e04-79d2-4fee-a95d-bd007302b141_rw_3840.jpg?h=a1772290a85f344a2683638fb7f75d56)
Ferguson Solar Chronometer - for use by Victorian travellers & explorers. Picture from Musée de la Vie Wallonne, Liège
![Detail from Ferguson Solar Chronometer](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/a60551d5-ff79-4d2c-a025-852f00ffa160_rw_3840.jpg?h=d7e29fe8a94f5a14bef276132b2cc8f0)
Detail from Ferguson Solar Chronometer
![Christopher St. J. H. Daniel - 1977 - Dolphin Dial, Royal Observatory, London](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/40cdcfdc-c626-4f5a-a1f4-cd1b06a47330_rw_1200.jpg?h=3261b445e7b32a228849be111a1cd5f2)
Christopher St. J. H. Daniel - 1977 - Dolphin Dial, Royal Observatory, London
![Detail from the Dolphin Dial](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/4edfaa97-9431-4cec-a58b-2fd6e6ab1a21_rw_600.jpg?h=cc022c1af0b2e61c82f25ce16305d139)
Detail from the Dolphin Dial
![Albin Hoffmann - 2007 - www.precisionsundials.eu - Bütgenbach-Belgium](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/b948b316-7647-4f3f-aee4-13fe71785175_rw_1200.jpg?h=a0975d0818c6aebf60fdfc6d25df0264)
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](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/603c9b77-464d-4f1b-b096-48682c8c3351_rw_1200.jpg?h=9eeb7e88266d1ad54d74959d8ffbe9e8)
? Guiseppe Mara ? & ? Renaudi ? - 1997 -Chiusa di Pesio Nr Turin
![W.F. Ng - 1986 - Magdalene College, Cambridge](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/c7feaca0-060f-401e-b3ab-e7c8c9bf8de6_rw_1920.jpg?h=b81c48161fae812f0228b23818eee8a7)
W.F. Ng - 1986 - Magdalene College, Cambridge
![Sir Mark Lennon-Boyd & Fergus Wessel - 2013 - Obelisque Dial, Egyptian Garden, Buscot Park, Oxfordshire](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/0f9e0a5d-d16b-4727-93e8-b57826fc31a6_rw_1200.jpg?h=d37d2b72f43697ffd14a49ad58f05ac1)
Sir Mark Lennon-Boyd & Fergus Wessel - 2013 - Obelisque Dial, Egyptian Garden, Buscot Park, Oxfordshire
![Detail from Obelisque Dial](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/d0a7fb62-a47c-44ce-be31-97d55d4cbb11_rw_1200.jpg?h=ff28754219d237bbc4b50a705ef4237a)
Detail from Obelisque Dial
Click on images to enlarge & view captions
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](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/b3629db2-dd03-4ab9-9170-7791553aa10d_rw_1200.jpg?h=95a9634256bbcc06fcfb4c01d07be084)
Urbain Adam - 1866 - Cathedral of St. Martin, Colmar, France
![Christopher Daniel - 1995 - Radcliffe Observatory, Oxford, UK](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/c24ec3f7-881d-41fb-b8b6-6ca8564958d2_rw_600.png?h=666e5e925e331524b25ab1e1d61ab6f9)
Christopher Daniel - 1995 - Radcliffe Observatory, Oxford, UK
![Dr Alan Mills - 2007 - Eye of Time, Leicester University, UK](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/b7f3a583-02d6-4ece-b100-3ffe28145b29_rw_1920.jpg?h=452167842c292ba78a3e049dc3d85860)
Dr Alan Mills - 2007 - Eye of Time, Leicester University, UK
![Dr Frank King - 2004 - London Stock Exchange, UK](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/ec5c3e85-36f7-4183-9387-cf32c0e0de78_rw_1200.jpg?h=0f05673726c663659149f9e0625e4836)
Dr Frank King - 2004 - London Stock Exchange, UK
![Detail from Stock Exchange Dial](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/2d5f6d18-d47b-4674-a713-342b4e387fbe_rw_600.jpg?h=fdaf71479abfb09a5d71b080bed2c6e8)
Detail from Stock Exchange Dial
![Alastair Hunter - macmillanhunter.co.uk - 2011 - Noon Mark](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/366603ce-6631-49a1-a429-00099d2614ef_rw_3840.png?h=f7afe0482f9ed95c786944534eae0bf5)
Alastair Hunter - macmillanhunter.co.uk - 2011 - Noon Mark
![Vic McGrath - after 2001 - Smooth Sailing, Reconciliation Place, Canberra, Australia](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/9a951ba8-4182-46bb-a23d-5d47d8302548_rw_1200.jpg?h=a1a8ec03529060984517566eb9ca32d8)
Vic McGrath - after 2001 - Smooth Sailing, Reconciliation Place, Canberra, Australia
Click on images to enlarge & view captions
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](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/96524467-b8e7-4c27-9c27-a339910dfc3c_rw_1920.jpg?h=80b3e1274da8b00879a3ff31c5791dbc)
Mac Oglesby - 2002 - Vertical Declining "Rainbow" Spider Dial, Brattlesbury, Vermont, USA
![Mac Oglesby - Monofilar Standard Time Polar Dial](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/2a91ff05-ea98-4bdd-a15d-f623b8d1b93a_rw_600.jpg?h=5ade0e9701fa0c86bb302b04861d2f90)
Mac Oglesby - Monofilar Standard Time Polar Dial
![Rick Twardy - 2001 - Parkes Observatory, Dubbo, New South Wales](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/21daffb7-088a-4b6c-8fc6-845b7982303f_rw_1200.jpg?h=3773eedeab0872ca45df736e0a605fac)
Rick Twardy - 2001 - Parkes Observatory, Dubbo, New South Wales
![Author's bronze Highfield House dial - 2016 - before being exposed to the atmosphere](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/0feb433d-ea27-403d-9ff9-308a930a0a0b_rw_1920.jpg?h=9658cd6c619389be4b3ce29ade0b7746)
Author's bronze Highfield House dial - 2016 - before being exposed to the atmosphere
![Highfield Dial after tow years in the atmosphere](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/29776388-9188-49ab-afe2-9d6f22ac8fd4_rw_1920.jpg?h=89972f4a1faac3d78a0d4c32c9885be5)
Highfield Dial after tow years in the atmosphere
![How to read a Spider dial.](https://cdn.myportfolio.com/cf59f354b34391ef9ddbec41a1409bef/ba3819a2-2fb1-4a8b-8c3d-fb4e61d4a1e0_rw_1920.jpg?h=a3bf477789637bbdefae389383e9ce17)
How to read a Spider dial.
Click on images to enlarge & view captions