ceiling sundial

[RKriegler]

a good and easy way to build a ceiling-sundial is to use the

Tridux 2000 by Dietrich Ahlers

Please have a look at:
http://www.hs-bremen.de/planetarium/astroinfo/sonnenuhren/ahlers/tridux.htm

There will soon also be an English text for it.

Best regards
Reinhold Kriegler

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Reinhold R. Kriegler
Lat: 53° 06' 53'' N   
Long: 8° 53' 54" E