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Sundials


some of my sundials

A meridian sundial indicates solar noon, which occurs when the sun reaches its highest elevation of the day, passing through true South and the local meridian.  The idea can be extended to create a sundial that indicates local civil noon.  Noon when daylight savings time is in effect can also be indicated.  Click here to view a meridian sundial I made that has these features and to see some of my other sundials : Picture Gallery Of My Sundials.


analemmatic sundial

An analemmatic sundial is a horizontal sundial with a gnomon located at a date-dependent position.  The gnomon is often a person who stands at a date mark and reads the time by sighting in the direction of his or her shadow.  Click here to read my tutorial about designing analemmatic sundials: Analemmatic Sundial Tutorial.


sundial articles

Click to read my sundial articles (in Adobe Acrobat format):


1. St. Louis Sundial Trail

2. A cell-phone application that calculates and displays the Equation of Time

3. NASS Compendium article about polyhedral sundials

4. NASS Compendium article about sundial design

5. NASS Compendium article about displaying the EOT

6. NASS Compendium article about the design and construction of an eclipse sundial for Perry County, MO

7. NASS Compendium article about a sundial designed by Thomas Jefferson that is in the collection of the Missouri History Museum

8. NASS Compendium article about the Severson obelisk in Bellefontaine Cemetery

9. The sundial at Jefferson Barracks

10. NASS Compendium article about a sundial in St. Augustine, Florida

11. NASS Compendium follow-up article about a sundial in St. Augustine, Florida

12. NASS Compendium article about sundials in St. Louis, Missouri

13. NASS Compendium article about the sundial at Concordia Seminary in St. Louis, Missouri

14. NASS Compendium article about the painted-wall sundial at Barrens Church in Perryville, Missouri

15. A Guide to Sundials in the Missouri Botanical Garden in St. Louis, MO

16. NASS Compendium article about the Mullanphy School sundial in St. Louis, MO