Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 14
State/Province:  Arizona Country:  USA
Dial Type:  Horizontal Condition:  Excellent
  Latitude:   33° 20.358' N Longitude: 110° 58.902' W
  • Tohono Chul Park
  • A 25 inch circular engraved horizontal dial in a large irregular stone. Surrounding the dial on the stone are zodiacal signs and a beautiful engraved drawing of the surrounding mountains. The designer, John Carmichael, calls these dials "horizontal string heliochronometers" since the gnomon is a brass cable held very straight under tension from a heavy counterweight which is suspended from a brass hinged lever.
General Information:
  • Owner:
  • Designer: John Carmichael, Jr.
  • Builder:
  • Construction Date: 1998