Society of Glass Technology · [Sheffield] · leaf 453
s first became visible andthus readings could be made at lower temperatures with the redglass. Secondly, the colour change for a change in wave-length 22 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. was much less in the red part of the spectrum than in the green.The third reason for using red glass… … Fig. 15. VII.—Fuels, Refractories, and Furnaces. 38. Refractory Substances.—G. L. Dimitriand J. E. Delaunay, both in Paris (Brit. Pat.,May 1st, 1920, No. 142513. Provisional No.12145. Convention date, July 16th, 1918. Notyet accepted).—In a process for the productionof refractory and insulating…
Glass
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