Revisited Myth #18: Panes of window glass in old buildings are visibly thicker at the bottom, proving that glass is a viscous liquid that has “flowed” over time. | History Myths Debunked
How to dispose of glass window panes / Recyclable Double glazing
Window glass replacement how to guide | The Independent
How to Replace a Window Pane - This Old House
Old Glass | Panes of old, handmade glass | Colin Howley | Flickr
View Through Old Window Panes' Photographic Print - Felipe Rodriguez | Art.com | Old window panes, Window design, Windows