Society of Glass Technology · [Sheffield] · leaf 364
been reheated inthe glory hole in the process of manufacture. Such articles asclock-glasses, which are cut from large globes, always showed thispitted appearance, on the outer surface only. The pitting didnot, of course, appear in plate glass. All glass which is colourless and which contains…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
