Society of Glass Technology · [Sheffield] · leaf 572
FUELS, REFRACTORIES, AND FURNACES. 193 the end of which is at a slightly higher level than the inlet to thetunnel. The heating chamber is formed as a muffle, and theproducts of combustion from high-pressure burners, //, Fig. 113,pass from the surrounding flues to the discharge part of tho Fig. 112. … Fig. 113. tunnel, from which they escape at the end, and through damperedopenings about its length. Pyrometers, K, are fitted in the heat-ing chamber and along the discharge part, and observation open-ings, /, are provided opposite the burners. H. G. C. 256. Glass Furnaces. E. RoiRANT, France…
Glass
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