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University Park |
Pennsylvania |
USA |
Armillary Sphere |
Dial 64 |
| A bronze armillary dial with meridian and equatorial rings and Arctic and Antarctic circles on a stone pedestal. |
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Oberlin |
Ohio |
USA |
Sun Alignment |
Dial 63 |
| When is a flag pole more than a flag pole? When it has cement walkway curved for the summer solstice, a path for the winter solstice and a distinguishing straight cement line for the spring and fall equinox. This dial has no hour markers, and is intended to show the seasons. The tip of the flag pole will follow these lines at the appropriate day of the season. |
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London |
Ontario |
Canada |
Heliochronometer |
Dial 62 |
| A brass Pilkington-Gibbs heliochronomer aligned to the celestial equator. Rotate the helioscope until the sun shines from the upper hole to the lower plate, then read the time from an accompanying dial. The Pilkington-Gibbs dial includes a patented cam mechanism to adjust for the Equation of Time. |
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Great Falls |
Montana |
USA |
Equatorial Dial |
Dial 61 |
| A monumental bow-string equatorial dial of curved 4x6 inch welded steel I-beams forming a 14 foot diameter equatorial arc. Stainless steel Roman hour numerals 5 AM to 7 PM are welded to the arc. Metal for the dial was once used at Rainbow Dam and was formed and welded at Rainbow Powerhouse. |
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Rochester |
New York |
USA |
Equatorial Dial |
Dial 60 |
| A large 40 foot equatorial dial. The dial band is about 5 feet wide with raised Roman numerals at each hour mark. The gnomon is a rod approximately 15 feet long, ingeniously suspended by wires at the center of the dial. No shadow of the support wires can be seen, just the line of the gnomon appears on the dial band. |
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Highland Park |
Illinois |
USA |
Horizontal Dial |
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. |
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St. Louis |
Missouri |
USA |
Vertical Dial |
Dial 54 |
| This modernistic vertical south declining dial was designed by Mel Meyer and installed in 1989. The dial is an 8 by 10 foot stainless steel sundial with ribbed hour lines. No numerals are used. The gnomon is a solid triangle 3.5 inches wide by 85 inches high. |
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Brunswick |
Maine |
USA |
Vertical Dial |
Dial 53 |
| A set of three declining vertical dials each approximately 3x4 foot of carved Indiana Limestone set into the east, south and west facades of Hubbard Hall. Dial faces include hour lines and Arabic hour numerals. Each bronze gnomon rod is additionally supported at its end. The dials are not corrected for longitude and there is no EOT correction provided. With corrections, all three dials tell accurate time. The building south wall declines approximately 18? west of south. |
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Gaithersburg |
Maryland |
USA |
Polar Dial |
Dial 51 |
| Briggs Commemorative Sundial. One of the more complex and elaborate ones in the US. The dial plate lies parallel to the earth's axis of rotation. The dial has three gnomons. The upper and lower point out Eastern Standard time, the middle one indicates local apparent (solar) time throughout the year. A copy of the brochure is in the NASS Archives. |
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Stow |
Massachusetts |
USA |
Vertical Dial |
Dial 48 |
| A wood vertical dial on the south side of a schoolhouse. Has hour lines from 6am to 6pm with Roman numerals at each hour. The gnomon radiates from a plain diamond in the center of the dial. |
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Heber City |
Utah |
USA |
Cylindrical Dial |
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. |
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Cambridge |
Massachusetts |
USA |
Vertical Dial |
Dial 45 |
| Painted Dial |
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Foxboro |
Massachusetts |
USA |
Vertical Dial |
Dial 43 |
| Very large vertical dial mounted above the entrance to the Foxboro Research Center. With solstice and equinox lines and a noon analemma. |
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Danvers |
Massachusetts |
USA |
Vertical Dial |
Dial 42 |
| An east- declining vertical wood dial above the main doorway of the Rebecca Nurse House. Rebecca Nurse was a victim of the Salem witch trials in 1692. The House was restored in 1909 and it is believed this dial was added at that time; there is no evidence the house originally had a sundial. |
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Boston |
Massachusetts |
USA |
Vertical Dial |
Dial 41 |
| Once high on east facing wall of the Old State House, was a vertical declining sundial originally built in 1713. The 6x4 foot dial was just above the third story window. It was restored by R.N. Mayall in 1957. But the background became a faded blue and hour lines were hard to see. At least the Roman numerals along edge were clearly visible. In the upper left corner of dial, just above the gnomon,was a small yellow sun. |
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Andover |
Massachusetts |
USA |
Armillary Sphere |
Dial 40 |
| A very large and ornate armillary sphere, approximately 8 feet in diameter. Sculpted by Paul Manship in 1928 and cast by Alexis Rudier Fondeur in Paris. The armillary has large figures inside the sphere at the base and the equatorial circle has signs of the zodiac in raised metalwork. The dial sits atop a well proportioned light granite pillar that is about 3 foot high and 4 foot diameter. |
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Dodge City |
Kansas |
USA |
Horizontal Dial |
Dial 39 |
| Two horizontal dials side by side, one for Central Standard Time and one for Mountain Standard Time. The CST dial shows hour lines for 7 AM to 7 PM, the MST dial shows 6 AM through 6 PM. Corrected for longitude. Each dial is approximately 13 meters in diameter. In front of the dials is a large concrete plaque with the equation of time and analemma. The analemma is represented as summer on top and late months (Feb, Jul) on right. This is not the way it would be viewed in the traditional series of photos nor is it the way a shadow would be traced. The width is exaggerated, presumably to allow a better reading of the minutes of time. The paint is peeling badly. |
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Bloomington |
Indiana |
USA |
Horizontal Dial |
Dial 38 |
| A small horizontal dial, about 18 inches in diameter. The dial plate is tilted 2 deg to the horizon to allow water run-off. However, more unusual is the base that contains a hand crank connected to a scalloped drum that tilts the entire dial to adjust for the Equation of Time. The drum is rotated to the current date and the drum edge pushes a cam that tilts the plane of the horizontal face so that standard time is indicated to within half a minute. The dial is actually mounted on an equatorial axis. Since 1979 the dial has gone into a state of disrepair and is overgrown by bushes. |
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Orlando |
Florida |
USA |
Horizontal Dial |
Dial 37 |
| This plain dial formed on a concrete base has an elegant gnomon, designed with an interior curve and oval. But alas, don't go to Florida to find it. Sometime in 2013 as Harcourt closed its Florida office, the new tenet had no use for the sundial and had it scheduled for demolition. |
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Lake Wales |
Florida |
USA |
Vertical Dial |
Dial 36 |
| Beautiful vertical dial, approx 12x6 foot of Georgia marble with a brass gnomon approx 5 foot long. Declination lines present. Hour & half hour lines with hours in Roman numerals. Sunburst pattern above gnomon. From the Guidebook, published by the Garden: 'The famous sundial carved on the south wall of the Tower indicates the latitude and longitude of Iron Mountain. It is known as an erect declining dial as it stands vertically at an exact right angle with the surface of the earth... and does not face directly south but is tilted towards the east with a declination of 4 degrees, 20 minutes.' It has an Equation of time chart and shows the days of the months as well. Directions are to 'Add minutes shown for each day to obtain Eastern Standard Time.' |
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