Glass and Glass Manufacture

acid alumina annealed glass annealing automatic aventurine batch becomes Bicheroux blow-iron blown borates bottles bowl British glass bulb burnt clay Centigrade chemical coloured glass cool Courtesy covered pots cracked Crown glass crucible crystal glass cylinder decolorizers decoration diameter electric enamels fire-box fire-clay flame footmaker Fourcault Fourcault process fuel furnace gas-fired gathering give glass house glass maker glass manufacturer glass-melting glassmaking glassware hand heat Hermansen hot glass hot metal iron lead lead crystal lead oxide lehr lime manganese manganese dioxide marver materials melting method mixture molten glass mould obtained opal optical glass oxide pieces plastic plate glass polariscope polished pontil portions pot arch pot-clays potash present pressed glass produced Pyrometer re-heated Recuperative refractory rolled sand sections servitor shape sheet glass siege silicate soda-lime glass spun glass sulphate surface tank furnace temperature thickness thin tube ware whilst wine-glass workman