Technically both and neither of you are correct. But glass is technically a liquid and only remains flat now because of a better process of creation of glass. Glass was never made thicker side down though.pope_of_larry said:Good sir that is just not true glass is not a liquid back when the old glass was made they couldn't make it evenly and so they put the thicker side down so it doesn't just fall out.cfb_rolley said:glass is a liquid. if you look closely at a window that's extremely old, you'll see that it's thinner at the top and thicker at the bottom. also, low grade glass is ever so slightly porous.
and, every window cleaner is a little bit eccentric, especially those that do high rises.
On topic: 80% of all pictures on the internet are of naked women
Edit - Should have read thread before posting to this. Someone already psted this on page 2
http://www.scientificamerican.com/article.cfm?id=fact-fiction-glass-liquid&ref=digg.com
Explains it better than I ever could.