Society of Glass Technology · [Sheffield] · leaf 395
82 4 (1-5290) (1087) (48-67) — — — B (1-5510) (1270) (43-38) — — — .C (1-5710) (1422) (40-15) ■— -— — D 1-5910 1543 38-30 443 1100 0-713 E 1-6230 1822 34-19 519 1303 0-715 F 1-6508 2037 31-95 555 1482 0-718 Series 100SiO2,20K2O,xPbO. 183 4 1-5201 1029 50-53 300 729 0-709 B 1-5480 1200 45-67 348 852… … 15 20 25 Molecules of PbO. THE DEVELOPMENT OF VARIOUS TYPES OF GLASS. PART VII. 315 A comparison of the two series is shown in Fig. 2. Curves 1and II represent the variation in ^D for the two series. The following remarks have to be made upon the opticalconstants of these two series of glasses: —…
Glass
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