Society of Glass Technology · [Sheffield] · leaf 403
re obtained by the usual method. 322 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. Table III.Series 100SiO2,20Na2O,20K2O,:tPbO. Series 100SiO2,10Na2O,10K,O,zPbO. Melt Melt ... ^ No. Density. Xo. Density 184-4 (2-690) 185 A (2-623) B 2-888 B 2-884 C 3080 C 3126 D 3-248 D 3-339 E 3-507 E 3-676 F 3-731… … 10 15 20 25 Molecules of PbO. (2) In glasses containing more than 10 mols. of PbO, increasingthe alkali content lowers the density. (3) The rate of increase of density per mol. of PbO added isgreater in the series containing the smaller alkali content, and itdecreases with increase in PbO. (4)…
Glass
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