Dear Membership, I've posted a preliminary article on the Cycloid Polar Book Sundial at:
http://www.vandp.com/cycpolbuk.pdf I intend to make a full model of this dial in ceramic, but, it is far too wet here in Oregon at the moment for clay to dry. I hope the sketches and notes are enough to be understandable. If not, drop me a line with your questions and I'll revise the document. Enjoy the Light! [43.126N 123.327W]
