Sundials - World's Oldest Clocks

North American Sundial Society

Casa Grande  

Sundial 457
State/Province:  Arizona Country:  USA
Dial Type:  Horizontal Monofilar Condition:  Excellent
Latitude:   32° 53' N Longitude:   111° 47' W
Location:
  • Abbott laboratories, 1250 W. Maricopa Hwy. In front of the main building entrance
 
Description:
  • This horizontal dial is an engraved flagstone approximately 40 inches in diameter designed by John Carmichael. The monofilar gnomon is a stranded brass cable that extends upward to a height of 15 inches and is held taught by a rock counterweight. The engraved stone shows time marks to 5 minutes, corrected for longitude. Time and direction of sunrise and sunset for the equinoxes and solstices are also given.
 
General Information:Inscription:
  • Owner: Abbott Laboratories
  • Inscribed "Abbott Laboratories". Has engraved artwork of the Tohono O'Odam Indians, The Paths of Life.
  • Designer: John Carmichael
  • Builder: John Carmichael
  • Construction Date: Aug-99