John Carmichael wrote: > You are right Bill. That's a great idea! I had never thought about it, > but it's true. A flat circular disk that permanently mounted parallel to > the dial face will always cast a circular shadow on the face. It's such a > simple concept, I wonder why nobody's ever mentioned this before. Do you > know of any dials with this type of nodus? I don't.
I seem to recall this issue was discussed several years ago on the mailing list. And one example of such a nodus can be seen on the southwest-facing vertical decliner, designed by radio astronomer Ron Bracewell, which adorns the Terman Engineering building at Stanford University. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -
