Society of Glass Technology · [Sheffield] · leaf 78
ases with increas-ing silica content, and the rate of decrease falls rapidly as thesilica content becomes greater. The curve gives the total dis-persion G to F for Na,0 as 0-01165, and a v value of 453. THE DEVELOPMENT OP VARIOUS TYPES OP GLASS. PART I. 13 3. Devitrification. In cooling from 1350°… … / SERIES IOOSlO^jcN^O / Variation of Refractive IndexDispersion andVvalue WITH THEMOLECULAR COMPOSITION 1000 900 800 -1 20 40 60 8o Molecules Na20.Fig. 2. segregated lumps of silica, each accompanied by a characteristicbubble, and the glass as a whole exhibited a blue milkiness. Fromthis it may be…
Glass
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