Society of Glass Technology · [Sheffield] · leaf 354
resentnecessary with clay refractories. In the case of well-dried pots,arching could be reduced to a minimum or perhaps dispensed withaltogether, and in the case of tanks the drying and warming upwould not be the tedious business it is to-day. Porosity. The degree of openness of structure of a… … [To face Trans., p. 252. Magnified 33 diam.
Glass
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