Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Texas

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Port Arthur Texas USA Polar Equatorial Dial 446
A large Erickson Monument polar equatorial dial of light colored granite, approximately 6 feet in diameter and 6 inches thick. The gnomon shaft is steel, extending from the ground through the dial plate and outward another two feet. The base is a simple tier of raised concrete. 24 hours are inscribed on each side of the dial (summer and winter) as radiating lines with Arabic numbers at the end. Time is graduated by half-hour and 5 minute marks. Two equation of time graphs, each about 3 x 6 feet engraved in granite, are set at the north and south ends of the dial, providing corrections from Apr-Sep, and Oct-Mar. [An interesting note about the engraving for the Apr-Sep graph: The line originally said "For daylight savings time, subtract one hour", the word "subtract" was filled in and "you add" was inscribed over it.] In the top quadrant of the dial (both obverse and reverse) where the sun's shadow will never cast, are the names of cities in 16 different Time Zones. A beautiful and well-crafted sundial, it makes a fitting Seaman's Memorial. Compare this dial with other Erickson dials
San Ygnacio Texas USA Equatorial Dial 571
A stone equatorial dial with an iron gnomon. Inscribed on both sides with hour lines. Placed above an entrance to a walled fort also built in 1851. Legend says Jose Villarreal designed and built the dial to celebrate his escape in 1820 as a child after capture by Lipan Apache Indians and being guided by the north star in his return home. Dial Recorder Mary Garza is the great-great-granddaughter of Jose Villarreal.
Sherman Texas USA Noon Meridian Dial 902
Outside the library are two stone granite guardians about 12 feet tall. They create a noon marker along a low stone wall set along the solar meridian. There are three markers rods set horizontally across the top of the wall that catch the shadow of a horizontal bar set between the two granite pillars. The shadow falls on the farthest horizontal rod on the wall at winter solstice. During the summer solstice, the shadow falls on the nearest rod to the granite block. And on the spring and fall equinox, the shadow falls on the middle rod.
Waring Texas USA Vertical Dial 870
This is a rare American stained glass sundial, accurately telling time and season. It occupies the center panel of a five panel window that forms a cross. The vertical sundial panel measures 28x28 inches and declines 48° west of south, so it only functions in the afternoons. The dial is longitude corrected and indicates Daylight Saving Time when readings are adjusted using the Equation of Time. The gnomon is a 3/4 inch brass ball nodus attached by a non-polar axis rod to the aluminum Sussman window frame. It is the only stained glass sundial in the world that uses frosted colored stained glass to enhance the view of the nodus shadow. It has three seasonal date lines, a solar noon mark, and other marks showing special anniversary dates. It contains the traditional fly, seen on the the lower yellow panel between 1pm and 1:30pm.
Wills Point Texas USA Horizontal Dial 884
This starburst sundial is 6-3/4 inches in diameter, made of 1/8 inch aluminum plate. The dial is actually set in a 12-point compass rose, showing the azimuth every 30 degrees. Time marks are every 15 minutes with hours in Arabic numerals. All marking, latitude, longitude, and inscription are engraved into the dial plate.