John Carmichael wrote (04 August 2003 17:27) <What about attaching the gnomon to the building and have it hang outside of the protective cover?>
I guess that as far as laying out the dial goes that would be equivalent to displacing the gnomon away from the dial by (thickness of cover) * (refractive index of cover - 1). Would anyone like to confirm that or give the correct answer if not? Regards Andrew James -
