Society of Glass Technology · [Sheffield] · leaf 384
9 1069 49-57 310 759 0-710 B 1-5558 1246 44-57 360 886 0-711 c 1-5761 1390 41-45 401 989 0-712 D 1-5927 1522 38-94 437 1085 0-713 E 1-6219 1757 35-40 501 1256 0-715 F 1-6472 1980 32-6S 560 1420 0-717 Series 100SiO2,20Na 20,xPbO. \81 A 1-5186 990 52-38 289 701 0-709 B 1-5448 1191 45-74 345 846 0-710… … 10 15 20 25 30 35 Molecules of PbO. 304 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. Curves I. and II. of Fig. 2 represent the variation in tjd in thetwo series with increasing PbO content. It will be observedthai>— (1) The refractive index in both series increases as the molecularPbO content…
Glass
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