Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Rhode Island

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Newport Rhode Island USA Vertical Dial 671
An 8x8 foot vertical dial of carved stone with hour lines and Arabic numerals and with Zodiacal symbols around dial perimeter. Dial declines to the west and has a bronze gnomon. Access to view dial is available to all campus visitors.
Providence Rhode Island USA Vertical Dial 857
The vertical dial is a metal frame approximately 4 x 5 feet set high on a brick wall. Within the frame are metal hour lines from 6am to 5pm marked by Roman numerals. The hour lines are adjusted for the dial's longitude to show time for the 75th meridian. Metal lines for the solstices and equinox are set for the shadow of a small spherical nodus on the gnomon rod. The gnomon itself is anchored to a bronze plate stylized as the Sun.
Providence Rhode Island USA Vertical Dial 858
The 3 x 4 foot vertical dial is set high in the ashlar sandstone wall of Wilson Hall, the original Physics Building. In the middle of the dial is the Brown University shield, holding the gnomon rod. Surrounding the shield are hour lines. In the original 1890 architect's drawing, the hour marks were Arabic numbers from 6am to 6pm, but as built, the numbers were engraved Roman numerals and set inside the hour lines. Half hour marks were added as well. No longitude offset is made such that the noon hour line is vertical.
Providence Rhode Island USA Vertical Dial 859
This is a traditional vertical dial approximately 4 x 6 feet. The dial is surrounded by a row of square pink concrete brick. The dial backdrop itself is concrete with decorative dark block squares in each corner. The dial consists of a simple metal frame with hour lines that radiate from a small top central circle, all well proportioned. Hours of 7, 9, 12, 3, and 5 are marked with Arabic numbers, keeping the dial face simple. No solstice or equinox lines, but there is an artistic circular arc surrounding the central circle. Unfortunately the rod gnomon is completely missing.