Society of Glass Technology · [Sheffield] · leaf 405
variation in >jD in the two seriesas the PbO content becomes greater. The following facts are tobe commented on: — (1) The refractive index increases in both series as the molecularPbO content increases. (2) The rate of increase is greater in the series containing thesmaller alkali content. (3)… … 1-56 1-54 1-52 - 2000 1800 1600 RLh-CbCZlWC JsTLCLbOCs with iAc 1400 •IX 1200 1000 10 15 20 25 30 Molecules of PbO. 35 THE DEVELOPMENT OF VARIOUS TYPES OF GLASS. PART VIII. 325 (4) In alkali-lead oxide-silica glasses of the type 100SiO2,a>Na2O,a:K2O,yPbO,where x lies between 10 molecules and 20…
Glass
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