Sundials - World's Oldest Clocks

North American Sundial Society

Richmond  

Sundial: 173
State/Province:  Virginia Country:  USA
Dial Type:  Obelisk or Vertical Gnomon Condition:  Good
  Latitude and Longitude: 37° 30.000' N  77° 30.000' W
Location:
  • Science Museum of Virginia, 2500 W. Broad St.
 
Description:
  • 'Built in 1981 after an article in Scientific American (Dec 1980 "The Amateur Scientist") described a computer program for building a gnomonic dial with analemma hour lines. The dial was painted on the museum's parking lot, using a ball atop a 25 ft aluminum flagpole as the nodus. Semi-annual analemmas were painted in different colors, allowing correction for the equation of time. The dial was refurbished June 1992.
 
General Information:Inscription:
  • Owner: Science Museum of Virginia
  • Instructions for use, along with Lat/Lon of dial
  • Designer:
  • Builder: William U. Walton, SMV staff member
  • Construction Date: 1981 renovated 1992
 
References: Web Links:
  • Scientific American, Dec, 1980 'The Amateur Scientist'
Last Revised: 2019-07-20 17:02
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