Sundials - World's Oldest Clocks

North American Sundial Society

Norwell  

Sundial: 1003
State/Province:  Massachusetts Country:  USA
Dial Type:  Vertical Dial Condition:  Good
  Latitude and Longitude: 42° 09.845' N  70° 48.788' W
Location: Access: This is a private dial. See below for access details.
  • Dial is on the front of the garage at 81 Lincoln St., Norwell, MA. Unfortunately the dial is not visible from the street. Contact Roger at rsinnott@post.harvard.edu for visiting the dial.
 
Description:
  • This vertical declining dial is made of painted plywood with a simple white background and black hour lines and Arabic numerals. The gnomon is a brass rod without nodus. The hour lines have been adjusted for the difference between the site's longitude and the 75° W standard-time meridian. The hours are numbered as Eastern Daylight Time (EDT) instead of Standard Time, because in winter the sun is mostly low in the sky and trees in this wooded area block sunlight from reaching the sundial. Of course to obtain correct EDT, the equation of time needs to be added to the dial's time to account for the variable meridian passage of the sun. At most this amounts to -14 minutes (mid-February) or +16 minutes (early November).
 
General Information:Inscription:
  • Owner: Roger Sinnott
  • A motto and a plaque for the equation of time are being considered.
  • Designer: Roger Sinnott
  • Builder: Roger Sinnott
  • Construction Date: August 2018
 

Last Revised: 2020-04-16 15:04:45

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