Monday, July 24, 2006
Sunday, July 09, 2006
on looking at lighthouse stuff, specifically the one on Tory island, I came upong two new words. and had to find out what they meant...
Catopric -A light which uses a concave mirror for magnification.
Dioptric -A light which uses a lens for magnification.
Posted by motorfamilymotorcityman at 12:24