The glass in old windows is often the really early 'plate' or 'broad' glass to 'crown' or 'cylinder'.[5] Aged glass is recognised by its imperfections ('ream') which lead to optical distortion. Presidents leaving Business office formally current the sash to their successor in the course of the official inauguration ceremony. https://familyportraitphotography69012.getblogs.net/68334343/the-smart-trick-of-sash-windows-that-nobody-is-discussing