Sundials - World's Oldest Clocks

North American Sundial Society

Tucson  

Sundial: 14
State/Province:  Arizona Country:  USA
Dial Type:  Horizontal Dial Condition:  Excellent
  Latitude and Longitude: 33° 20.358' N  110° 58.902' W
Location:
  • Tohono Chul Park
 
Description:
  • 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
 

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