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Journal (1917)
Society of Glass Technology · [Sheffield] · leaf 303
1% BaO-1% Si02) = + 0-0024 = mean rise in tjd = + 000007 = mean rise in (rjF — r)c) It should be noted that as the percentage of barium oxide in aglass increases, the substitution of barium oxide for silica in per-centage amounts causes a greater increase in total dispersion. (9) The increase in… … 960 s© 940 f° a 920 s © 900 x 880 65 60 70 Percentage of silica. diminishing the silica, the barium oxide remaining constant, isshown in Fig. 6. Two sets of glasses are shown, the first containing10 per cent, of barium oxide and the second 15 per cent. (10) Fig 7 shows the variation with…Glass
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