Sundial - Longwood Gardens - Kennett Square, PA
Posted by: 
ripraff
N 39° 52.330 W 075° 40.614
18S E 442112 N 4413788
Pierre S. du Pont built this sundial in 1939 in the topiary garden at Longwood Gardens
Waymark Code: WMP9C4
Location: Pennsylvania, United States
Date Posted: 07/24/2015
Views: 6
"The Topiary Garden is the location of an analemmatic sundial that was constructed by Mr. du Pont in 1939. It took eight years of daily readings to perfect the sundial, which is accurate to within two minutes. A sign on the site explains how to read the sundial."
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"37.2 ft x 23.8 ft. This is probably the world's largest analemmatic, unusually designed to show standard time directly. It took 8 years of daily readings to perfect the sundial, which is accurate to within 2 minutes. Hour markers are bronze Roman numerals. Minute lines inscribed in limestone curbing. The gnomon itself is a moveable pole that is set on an AM or PM daily curve. NASS member P. Kenneth Seidelman was instrumental in correcting this design in 1978."