Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of New Hampshire

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Hanover New Hampshire USA Vertical Dial 832
This octagonal vertical sundial is mounted on the due south facing wall of Shattuck Observatory. The dial is painted on wood. The hours are VI to VI (6 am to 6 pm) with lines for half and quarter hours. The thick triangular gnomon is rigidly mounted on the dial face. The dial is in excellent mechanical condition but the paint is flaking badly due to sun and weather exposure.
Hanover Vermont USA Vertical Dial 702
A four foot octagonal dial painted on the south wall of Shattuck Observatory. Dial face has hour lines with 15 minute marks and Roman numerals. Dial need repainting.
Hartford Connecticut USA Pillar Polyhedral Dial 27
This is an 18th century polyhedral dial (dodecahedron). The dial was originally located at The Abbey, Storrington, Sussex, England. Carved stone with ten dials on a dodecahedral, some sunken, some planar. Pillar is about 12 ft. high.
Hartford Connecticut USA Equatorial Dial 28
A bronze equatorial dial presented to the college as a gift from the class of 1889. For its age, it is in remarkably good condition. The 3 foot wide by 2 foot tall half cylinder is engraved with both hour and declination lines. At the noon-equinox point of the dial face a perpendicular pole rises to the centerline of the cylinder and supports a N-S gnomon rod. Unfortunately the southern portion of the rod is missing. The base is a square, tapered pillar.
Hastings Minnesota USA Analemmatic Dial 640
A 5x3 meter analemmatic dial of natural limestone rocks with red flagstone and white limestone for month markers. Arabic hour numerals and month names are sandblasted into the stones. This dial was designed and built as an Eagle Scout project with an original request from the school science teacher, Mr. Rapatz. Roger Bailey of NASS provided technical guidance.
Havana Havana Cuba Vertical Dial 717
A carved stone, south-facing vertical dial with polar-pointing gnomon, hour lines and Roman hour numerals. The construction date of 1817 is prominently shown at the top of the dial. This is a historic Cuban sundial, known at the "dean of Cuban sundials" and referenced in "This is Cuba, Things of My Country."
Hawthorn Woods Illinois USA Equatorial Dial 876
This equatorial dial sits on a 61-inch octagonal base that serves as a columbarium. The dial is reminiscent of Erickson Memorial sundials. This granite sundial is 38.5 inches in diameter and 6 inches thick. The 3-inch diameter gnomon is made of hollow galvanized steel pipe with a white powder coating. The engraving on the sundial was done using a rubber stencil and sandblasting with aluminum oxide abrasive. No water jet was used. The center core hole was cut using a diamond segmented coring machine, like a big drill press with an expensive hole saw.
Heber City Utah USA Horizontal Dial 531
A 51 x 36 foot horizontal dial with a 21 foot welded silicon bronze gnomon standing 14 feet high. The hour lines are copper inlaid in concrete and the hour markers are 4 inch high bronze Arabic numerals. At solar noon, sunlight passing through a slit in the gnomon illuminates the noon marker with a line of sunlight while prisms on the end of the gnomon project rainbows onto this line of light, making the sculpture a seasonal calendar as well as a way to tell time. Created by sculptor Robert Perless, Sun Dagger functions as a unique celestial observatory to amplify the synergy of man and nature. It also works as a seasonal calendar, celebrating the winter and summer solstices and the vernal and autumnal equinoxes with rainbows crossing the line of sunlight from the gnomon slit and falling on inscribed plaques.
Heber City Utah USA Equatorial Dial 47
A 10 inch wide, cylindrical-segment equatorial dial 8 inches high, fabricated from a section of large PVC pipe. The dial face is aluminum sheet bonded to the PVC pipe and marked by photochemical engraving with hour lines showing analemmas to correct for EOT; hour lines are corrected for longitude and show both standard and daylight saving Arabic hour numerals. Winter and summer solstices and equinoxes are marked. The gnomon is a pointed brass rod. Instructions for use are included on dial face. The dial is mounted atop a 4x4 inch steel post 30 inches high tiled with travertine and marble. This dial demonstrates accuracy of 2-3 minutes year-round. This dial is located at a private residence. The owner will allow viewing if prearranged by contact through email at
Hibbing Minnesota USA Equatorial Dial 375
An 8 ft high equatorial sundial designed and built by David Aho. Made of welded stainless steel with a brass gnomon and brass equatorial arc dial. The 60 inch diameter equatorial dial is engraved.
Highland Park Illinois USA Horizontal Dial 55
A cast bronze horizontal dial with hour, half-hour and quarter-hour lines and Roman hour numerals for 5AM to 7PM. Dial face symbol depicts a winged hourglass.
Highland Park Illinois USA Polar Dial 377
This cast iron polar dial is centered in a 7 foot diameter, echoing the form of a "train wheel", matching the theme of a small park situated between a historic train station on the ancient Green Bay Trail and a pioneer cemetery. The polar dial has raised hour lines on the cast iron plate. Designed by Stephen Luecking and built at St. Mary's Foundry.
Highland Park Illinois USA Analemmatic Dial 400
A simple analemmatic dial with a cement base with marks for standing at the months of the year. Surrounding the base is a light brick plaza with markers for the hours. The plaza is surrounded by flowers.
Hillsborough New Jersey USA Gnomonic Dial 504
A gnomonic horizontal dial constructed in bright colors on a 20 by 14 foot concrete pad. The gnomon is a vertical steel pipe 1 meter tall with a small nodus at the top. Hour lines are marked within summer and winter solstice and equatorial lines. The dial is marked with both standard and daylight local solar time. The noon line is complemented by its analemma with the months labeled. The sundial is used by Sunnymead School to aid in the science curriculum. The sundial was designed and created by Michael Folsom-Kovarik as an Eagle Scout project. Construction began on July 20, 2002 and ended on June 28, 2003. Michael was approached by Paul Stockman (the Home and School Association's treasurer) with the idea of building a sundial at Sunnymead School. Michael then came up with the design (made to keep the sundial as a useful teaching tool for the entire school day no matter what time of year) and location. After a year and a half from planning to completion, Sunnymead Elementary has a working and accurate sundial!
Hollidaysburg Pennsylvania USA Horizontal Dial 437
This is a large horizontal dial 10 feet in diameter, constructed of marble with a steel gnomon. The sundial was donated in honor of Courtney Leigh Clayton and is open to the public as part of the beautiful Discovery Garden.
Hollywood Maryland USA Horizontal Dial 373
A 26 inch hexagonal, English-made slate horizontal dial with a 3/8-inch thick, knife-edge bronze gnomon and no noon gap. Dial face has hour, half-hour and quarter-hour marks in inner bands, and 3-minute marks in the outer band. Hours are marked with Roman numerals. The dial sits on a hexagonal pedestal carved with coats-of-arms of families that lived at the plantation, including the Plater, Briscoe and Satterlee families. The dial face has four concentric bands of hour numerals. The outer band reads local time with an inscription that notes local noon is also noon at Boston, Peru and C. Redondo, and midnight at Borneo and Chinese Tartary. The second band shows noon in New Zealand, London and other locations. Two additional inner bands show noon in still other cities around the world. The plantation house overlooking the Patuxent River was constructed between 1710 and 1717 by James Bowles. Bowles died in 1727 and Sotterley Plantation passed through Plater and Briscoe ownership. The plantation was bought by Herbert L. Satterlee in 1910 and restored, including his vision of an 18th century garden in which he placed this sundial, received as a gift, in 1925. Admission fee is required. Call 301-373-2280 for hours.
Holt Michigan USA Equatorial Dial 646
A four foot high equatorial dial possibly of painted cast aluminum on a four foot high segmented granite pedestal. Hour ring displays Roman numerals for EST with five minute marks with longitude correction. Tiles of pedestal bear names and birth/death dates of those memorialized.
Honolulu Hawaii USA Horizontal Dial 278
The dial is a raised horizontal circle 18 inches in diameter. The nearly inch-wide brass gnomon supports a raised relief globe, with the Hawaiian Islands uppermost to accurately show which part of the world is in sunlight. The dial has hour lines and a ring of 5-minute marks. Hours are numbered from 6 until 18. Cardinal points and magnetic north are indicated. Dial shows some signs of deterioration. Designer Ginnosuke Ohara is a dialist with Japan's Research Institute for Sundials. The dial base is a mushroom design of concrete about 40 inches high and 40 inches in diameter. A time capsule is located in the base, to be opened in 2030.
Honolulu Hawaii USA Dial 291
Bronze. Outer circle has flame-shaped knobs projecting from rim. Indicator or axis cuts band diagonally, terminating in oval projection on lower side. Gift of Mrs. Theodore A. Cooke. This dial is no longer on display at the museum. When an enquiry was made in May 2002, none of the staff knew of the dial's existence until an elderly lady in the gift shop knew it was in storage. The lady was a grand daughter of Mrs. Cooke.
Honolulu Hawaii USA Equatorial Dial 340
As of May 2012, this dial was removed from display by museum staff. Bronze equatorial dial 20, inches in diameter. The dial is outlined by an ornate ring tilted in the plane of the polar axis with extending flames representing the sun. A gnomon rod bisects this ring. The dial base is a statue of the Hawaiian mythological figure Maui snaring the sun, Kala, with ropes to snare the sun. The dial itself is a semicircular portion of an equatorial ring with inscribed hour lines and raised Roman numerals. The dial has been exhibited in various museums in San Diego, San Francisco, Seattle and Vancouver before permanent installation at the Bishop Museum in Honolulu. Gnomon and equatorial ring appear misaligned for 21 degree latitude. The museum is will correct the dial in the near future.