0 Members and 1 Guest are viewing this topic.
However the panes of glass thing is apparently somewhat of a myth. Glass ought to behave like a liquid but it is so viscous that there would be no discernable difference over the sort of time period that we have been able to make it. The reason that the bottom is often thicker than the top is that window glass was made by blowing a big flat bottle, and then cutting it up. the middle of the bottle would be thicker than the outside. The glaziers would then tend to put the thick end at the bottom, as you want to have a system or it will look silly, and that feels more stable.