Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of North America

This is a selected listing of sundials in the North American Sundial Society Registry. Click on any dial thumbnail picture or city name to display the full dial description with additional information and images.

 

Oklahoma

 
Claremore Oklahoma USA Horizontal Dial Dial 549
A 24x36 foot all-concrete horizontal dial with marks to indicate summer solstice and equinox. Located on private property; contact owner Dan Wilson to arrange viewing.
 
 
Enid Oklahoma USA Equatorial Dial Dial 351
A striking stainless steel equatorial dial 6 ft tall, 4 ft wide, and 6 ft deep. The equatorial ring is more than 2 ft wide. The dial can be used as a simple equatorial dial, reading the hour from a shadow cast by the steel wire gnomon aligned to the polar axis. However a bead nodus located in the middle of the wire casts its shadow onto the equatorial ring as well. An analemma on an arched plate is set to slide along the equatorial ring in a track. By sliding the plate to a position where the nodus shadow falls on the analemma for the day of year, the dial corrects for the Eot. Markers on the analemma plate point to the correct time at the edge of the ring. The top of the ring is inscribed for Central Standard Time and the bottom is inscribed for Central Daylight Time. Overall, the sundial is accurate to about a minute any day of the year. The analemma was computed by Lt Col Bill Welker, USAF and the dial was funded by McCasland Foundation.
 
 
Owasso Oklahoma USA Analemmatic Dial Dial 961
This is a nicely done 12 x 6 foot analemmatic. The time ellipse is white concrete with black hour marks using Roman numerals. Time is adjusted for longitude and daylight savings time. The walkway has black month marks and an explanation plaque.
 
 
Stillwater Oklahoma USA Vertical Dial Dial 945
This modern etched glass sundial faces due south with hour lines from 6am to 6pm marked in Roman numerals. The dial is approximately 3x4 feet and held extended from the windows behind. The gnomon is a simple brass rod without nodus. No solstice lines or other embellishments mark the clean look of the dial face.
 
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