The glass in old windows may be the really early 'plate' or 'wide' glass to 'crown' or 'cylinder'.[5] Previous glass is recognised by its imperfections ('ream') which bring about optical distortion. These strips tend to be well suited for draught-proofing a window with casements although not sash designs.  'The sash https://french-bulldog-statue22109.tokka-blog.com/36056844/what-does-sash-windows-mean