Society of Glass Technology · [Sheffield] · leaf 305
perature. This result was repeated, and it wasalso shown that very little change in the refractive index of theoriginal glass was caused by annealing, the actual change being adecrease of about 0*00000. In addition, one specimen which had been annealed from 500°,and which consecpiently had a… … wave number x 10Fig. 4. was, as a result of this treatment, again reduced to the full annealingvalue. Absorption Measurements. It was considered of interest to examine the limits of absorptionof the ultra-violet by these glasses. This was done by means ofa Hilger Quartz Spectrograph, E. 3, and…
Glass
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