Dear Rodney et al, I have been fascinated by this discussion about glue. You have been given sound advice by John Carmichael, Tony Moss and others. I have a related comment...
It is worth pointing out that temperature can be important. This is not a problem if you are doing your gluing in a workshop (which I assume you are) but anyone who is using glue to attach a dial to a plinth or wall outdoors needs to watch this... For obvious reasons sundials, especially horizontal dials, are often in exposed places; you want a clear view all round. I recall fixing a dial in winter and the glue simply wouldn't spread at all. We fixers had to use a blow lamp to warm up the plinth which was, in every sense, stone cold! At the other extreme, in high summer, the glue set almost the instant the slate dial was offered up to the plinth. I reckon to get a few moments to align the dial properly but didn't get that opportunity this time. As a result this dial is forever half a degree out :-( Moral: put your hand against the two faces to be joined before applying the glue. If either face is too hot for comfort or too cold for comfort you may be in trouble. Tony can now tell us how he fixed his dial in Longyearbyen. That was a pretty cold fixing occasion! Best wishes Frank King Cambridge, U.K. --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
