I have been given a sundial that may be a Glynne replica drawn by Fer deVries. I found it at a friends house in the suburbs of Boston, Massachusetts USA. The gnomon was mounted backwards. There are some pictures at:
http://www.dickkoolish.com/rmk_page/pictures_060407.html The screws were steel and rusted, and I had to drill the heads off in order to remove them. When I went to replace them, I discovered that they were not a standard english or metric thread. The dial plate is about 12" in diameter and the gnomon angle is 54.5 degrees. It says Fer J. deVries 1982 under the gnomon. An old message in the sundial archive mentions a similar but smaller dial. http://www.mail-archive.com/[email protected]/msg04470.html The old screws are the same diameter as a 4mm metric screw, but the thread is .8 pitch or 32/in, so an 8-32 is too big and a 4mm-.7 is too fine a thread, so I'm wondering what to do about re-attaching it. Also, it looks like the dial plate was once glued to the marble base disk, but the adhesvie has long since dried out and failed. I assume glue was used to prevent the thin dial plate from being lifted and bent. So, should adhesive be used, and what kind? --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
