Society of Glass Technology · [Sheffield] · leaf 423
7 D, F, J) it is 20 per 342 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. cent. The values of the two glasses 186 D and 187 Z> are extra-polated. It will be noted that the increase for ( + 1 per cent, of Na20 —1 per cent, of SiO,) is greater than for (+1 per cent, of K20 —1 percent, of Si02). (13)… … 1300 1200 1100 1000 1 X 70 65 60 Percentage of Si02 70 65 60 Percentage of Si02. (14) The results for the glasses 186 C, E, H, 186 F, J, 186 L, M,186 P, Q, and 186 S, T yield the following mean values: ( + l%Na20 - 1% Si02) = +0-0024 = rise in r,D = +0-00013 = rise in vF — V0 The corresponding…
Glass
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