Society of Glass Technology · [Sheffield] · leaf 143
as in many VOL. V. G 82 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. cases a higher -n^ value and a lower density value than thecorresponding PbO glass is very noteworthy. (2) In the case of the corresponding alkali-lead and alkali-limeglasses containing 60 per cent, of silica and 25 per cent, of… … 5 10 15 Percentage R0. Fig. 9. - 950 g e900 5 X 850 5 10 15 Percentage R0. Fig. 10. (3) In both PbO and CaO glasses, those containing equal per-centage amounts of both Na20 and K20 are intermediate in theirt/d values between the corresponding Na20 and K20 glasses. (4) Where silica remains constant…
Glass
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