Society of Glass Technology · [Sheffield] · leaf 428
potash glass,proving that, weight for weight, soda is a better flux than potash. (2) Where the silica remains constant in a series of glasses, thesubstitution of lead oxide for alkali raises the melting point in aslight degree. (3) The substitution of either lead oxide or alkali for silica…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
