Society of Glass Technology · [Sheffield] · leaf 132
is interesting, then, to compare the temperatures at which thisglass has definite mobilities as given by the two curves on Fig. 9 andFig. 11, which were obtained at different times and using differentconditions (Table V). VISCOSITY OF GLASS NEAR ITS ANNEALING TEMPERATURE. 35 Table V. Temp, from No.… … 520 560 600 640 Temperature.Fig. 9. 680 720 760 The close agreement of the temperatures in the third and fourthcolumns amply justifies this method of obtaining the actualmobilities of this series of glasses. From these curves (Fig. 9) it is possible to measure the rate ofchange of mobility with…
Glass
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