2 o sub 3 3 59 3 57 3 59 3 57 3 52 3 48 3 57 3 55cao 0 36 0 72 0 72 0 71 0 7 0 36 0 36sro 19 2 19 1 17 9 16 5 13 6 10 9 17 8 16 4bao 29 3 30 1 30 2 32 35 5 38 9 31 32 8as sub 2 o sub 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1a p 667 667 666 666 665 663 665 665st p 629 629 629 629 626 625 626 627exp 78 9 79 5 78 4 78 8 79 6 79 5 78 5 79 1liq 1050 1055 1035 1055 1075 1090 1060 1060______________________________________ table ia reports the same glass compositions but expressed in terms of cation percent on the oxide basis table ia______________________________________ 1 2 3 4 5 6 7______________________________________sio sub 2 54 5 54 5 54 5 54 5 56 5 52 5 54 5alo sub 1 5 14 2 12 2 10 2 8 2 8 2 12 2 8 2bo sub 1 5 4 4 4 4 4 4 6sro 13 6 14 6 15 6 16 6 15 6 15 6 15 6bao 13 6 14 6 15 6 16 6 15 6 15 6 15 6______________________________________ 8 9 10 11 12 13.