Marson, Percival · London, New York [etc.] Sir I. Pitman & Sons · leaf 106
pontil still at the centre, forminga bullion point or slight swellifig, due to the knob ofglass used in affixing it {d). ]Siext, the workman, keeping the disc in rotation, 89 90 GLASS brings it away from the furnace and allows the metalto stiffen and set by cooling, when it is carried to… … FOUR STAGES IN CROWN GLASS-MAKING It is evident that the centre portion, containing thebullion point or bulls eye, is useless for plain windowglazing, but occasionally these are sought after by glassdecorators for use in coloured leaded lights for doorpanels, etc. CROWN, SHEET, AND PLATE GLASS 91…
Glass manufacture
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