Society of Glass Technology · [Sheffield] · leaf 703
ril 1st, 1921).—In a fur-nace for heating metals,melting glass-making ma-~b\tfg£ ^5^v, J?^\ terials, etc., in which two ^^\J^^^^^^^^^^^\^^i passages, A, B, are formed on the crown, the lower forheating the air for com-bustion and the upper forthe escape of the wastegases, baffles arc formed… … Fig. 192. 382. Improvements in Pot Furnaces. M. W. Travers,London (Brit. Pat., No. 177085, May 3rd, 1921).—In a gas-firedfurnace for heating melting-pots for glass, gas from the producers,
Glass
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