Society of Glass Technology · [Sheffield] · leaf 748
spindle, 5, engages a belt, 12, whichcauses the spindle, 5, to rotate.The screw, 9, adjusts the height ofthe furnaces, 7. Fig. 246 shows asection of the furnace, 7. Air enter-ing a pipe, 17, is heated during itspassage up the annular space, 18,to the aperture, 20, where it mixeswith gas from a… … Fio. 246 266 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY.
Glass
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