Society of Glass Technology · [Sheffield] · leaf 137
be augmented wherever possible by a parallel study alongthe lines of percentage composition. In dealing with the com-parison of the effect of the substitution of one oxide for another inglass, the dual method of attack is, in the authors view,especially to be commended, and is used in the present… … 2B.I00 S:q,IONA!0,IOKiO; XG.0 icaooScO^ zo\ip , xG.02J>.00 5:0, , 13-i^fiO , xCc.O 15 20 Molecules CaO.Fig. 1. The following conclusions are to be drawn regarding the mole-cular substitution of K20 for Na20 in these glasses: — (1) The substitution of 40 molecules of K20 for 40 molecules ofNa20…
Glass
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