Society of Glass Technology · [Sheffield] · leaf 420
, the silica remaining constant. (6) It will be seen that the rate of increase for ( + 1 per cent, ofPbO — 1 per cent, of K20) is greater than for ( + 1 per cent, ofPbO-1 per cent, of Na20). Fig. 5 shows the increase in total dispersion for the same glasses. (7) A study of the optical constants of… … 5 10 15 Percentage of PbO. 5 10 15 Percentage of PbO. 186 E, F, 186 H, J, K, L, and 186 Q, R, S shows that the mean risein refractive index of the D-line for (1 per cent, of PbO — 1 percent, of Na,.0) is 0-0010. The increase in total dispersion for (1 per cent, of PbO — 1 percent, of Na20) is…
Glass
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