>>649267824You just mixed up two things, Plebble
Older glass panes tended to be thicker on the bottom.
This was believed to be because glass was a sort of semi-liquid and over the course of a long time gathered at the bottom.
In truth, it was manufacturing imperfections. The reason it was always on the bottom is because the people who installed it had the basic logic to put the thicker side on the bottom.
Glass is a solid.
