Society of Glass Technology · [Sheffield] · leaf 280
efractiveindices of these glasses. (1) In both series the refractive index for the D line increasesas the molecular barium oxide content increases. (2) The rate of increase of rjD is greater in the series containingthe lower amount of potassium oxide. THE DEVELOPMENT OF VARIOUS TYPES OF GLASS. PART… … 15 20 25 Molecules RaO. Fig. 2. molecular barium oxide content of 28molecules is reached. Thenthe two glasses, 100SiO2,40K2O,28B^> and 100SiO2,20K2O,28BaO,have the same -q^ value, namely, 1-51- Their total dispersions aredifferent, being 0-01020 in the first ase and 0-01007 in the second.(4) In…
Glass
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