boydsbitchinbrews said:
That has been pretty thoroughly disproved. You can look it up if you want to spend more time on it, but the glass you refer to was pressed with a roller, which left it thicker at one end than the other. There is glass from ancient Roman times that hasn't "sagged to the bottom." We make glass differently now, and it doesn't sag to the bottom.
Ok here's a gimme, just for fun: http://www.glassnotes.com/WindowPanes.html
Ya you may be right. I've never actuall studied that or even really tried to. I did hear that back in high school.