Dear John,
I know this object as “Horizontoscope".
http://www.horizontoscop.com/eng/index_eng.html
I bought one recently after reading about it in one of Helmut Sonderegger’s
articles, where he gives the math of it.
There is a description of the TNO "jellyfish", as it was affectionally
known, in a paper by J van der Eijk, "Instrumentation for Solar Studies",
in the *Proceedings of the CIE Intersessional Conference on Sunlight in
Buildings*, Bouwcentrum International, Rotterdam 1967, and reprinted as
Good morning,
Has anyone come across this dial-related device?
https://picclick.co.uk/ARCHITECT-TOOL-Window-SUNLIGHT-SUN-ELEVATION-Enraf-144741549298.html
Cheers, John.
Dr John Pickard.
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
