Society of Glass Technology · [Sheffield] · leaf 576
p for combustion insupplied by anotherp u m p. The gasand air are sup-plied preferably atpressures of oneand one and a-quarter lb. per sq.in. r e s p e c tively.The remainder ofthe hot air fromthe heater, 35, isled by pipes, 38, toflues, 39, beneaththe combustionchambers, 6, andcirculates… … Fig. 122. from the air-heater, 35,the burners, gas being
Glass
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