SGS Gnomon Attachment

[John Carmichael]

Hi Tony & others,   What do you think is the best method to attach a metal rod gnomon to a stained glass sundial window?   It's the most frequent question I've been getting from the "Glassers". I do have an article that Mike Cowham sent me that mentions that in the seventeenth century, a threaded gnomon was usually bolted to a hole cut in the glass.  Of course that resulted in a lot of cracked glass and missing gnomons, especially if the glass was thin.   I am telling the people who ask that if the glass is thin, it would be better to solder the gnomon to the metal skeleton of the window or to thread the end of the gnomon and screw it into a bolt hole that is in the metal skeleton. We're you able to get a good look at Chris Daniel's dial? My personal feeling is that screwing it to a bolt hole would be the easiest,most precise, and strongest way of attachment. Of course, the rod would have to be bent to the correct angle before it's bolted in.  But I was wondering what you think about this? Also, couldn't you attach it to the building, just above the window, assuming it is practical and the design permitted it?   People are complaining that we don't have any sideview photos of the gnomons and want to know what they look like. (I'm going to draw several in Delta Cad and put it on the SGS site.  And I think I'll show them how latitude affects the gnomon angle too).   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>