Hello again: I played around some more drawing a horizontal sundial that has equally spaced hour lines and was able to find three different designs that seem to work. I used the same geometric technique using little circles of equal radii that I described in my first mailing on this topic. Because the circles in the early morning and late afternoon interset the adjacent hour lines at two points I noticed that different versions were possible. And low and behold, version C looks a lot like the version Fred talked about at the conference! (You were right Fred!)
I used one hour time lines as before to keep the drawings simple, but as Fred pointed out, if you use smaller time increments, the drawings become even more precise. I am e-mailing this new drawing which clearly shows all three versions to those people who requested drawings. If anyone else would like me to send this to them, please let me know. John Carmichael
