抄録
On the three commercial glasses the vertical temperature gradients at the center of the molten mass and near the side wall in a experimental furnace were determined. From these data and the results obtained by Halle and Turner for the glasses containing varying amount of iron oxide a heat balance was drawn up and the heat k (cal/cm. sec. °C) transmitted through the various glasses was calculated. The results representing the relation between calculated k and the iron content of glasses were plotted for the practical use. For example, the numerical value of k increased from 0.011 to 0.021% as the FeO rose from 0.30 to 0.15% for a constant Fe2O3 of 0.30%. The absorption coefficient of the glasses was also discussed.
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