Sundial 328
- Dial City: Kennett Square
- Dial State/Province: Pennsylvania
- Dial Country: USA
- Lat: 39° 52.367' N
- Dial Nr: 328
- Dial Type: Analemmatic Dial
- Dial Access: Public
- Lon: 75° 40.483' W
- Dial Owner: Longwood Gardens, Inc.
- Dial Designer: Knowles R. Bowen
- Dial Maker: Pierre S. du Pont
- Dial Date: 1939
- Location:
- Longwood Gardens on US 1 South east of the conservatory, in the topiary garden at ground level, West Tour.
- Description:
- 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.
- Dial References:
Longwood Garden Analemmatic Sundial - Seidelmann.pdf
- Other References:
- Sawyer, Fred. 'Of Analemmas, Mean Time and The Analemmatic Sundial - Part 1', BSS Bulletin, 94.2 (June 1994), pp. 2-6, and 'Part 2', in 95.1, (February 1995, pp. 39-44.
Last Update:
6/27/2012 15:25