These go in a gap on the aspect of the body. You insert a glue or sealant in those gaps, Slash the seals to the proper dimensions and place them in position. The glass in old windows could be the really early 'plate' or 'broad' glass to 'crown' or 'cylinder'.[5] https://thermal-performance12111.blogozz.com/34910279/not-known-facts-about-sash-windows