The past year, I've been playing around with a little 1cm. square mirror to be used for ceiling sundials that Fred S. gave us at the Hartford NASS conference.
I have a large room with a big ceiling. The roof of the house has an overhang over the southern window, however. In order that the level mirror not be shaded by the overhanging roof in the summer, I found that I had to lower the mirror closer to the floor. This of course caused the hour "spots" to be shifted far to the north on the ceiling. I wanted the ceiling dial face to be somewhat centered on the ceiling, but lowering the mirror shifted the hour lines too far north on the ceiling. I found that I could correct this by tilting it slightly to the south. Tilting the mirror will also help to center the dial face on a ceiling of a room that declines from south. Now, tilting the mirror makes calculating the hour lines mathematically very difficult (for me). But using the "connect the dots" method that we've been discussing greatly simplifies the drawing of the dial face. It just takes a long time (six months). John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com>
