Society of Glass Technology · [Sheffield] · leaf 443
FiG. 10. 64 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. … Fig. 11, nace hearth, such passage being of slightly larger diameter thanthe article and communicating through slotted holes with the furnaces above and the atmosphere below, so that, as the article isrevolved, its surface issubjected alternately toheating and cooling.Fig. 11 shows a…
Glass
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