. Glasses for protecting eyes from injurious ,* Fig. 6 Corning New Noviweld glasses: Top curve=shade 30 per cent; second curve from top=shade 3; nextlower curve=shade 4K; bottom curve=shades 6 and 7. Thickness of glasses, ynyn which is given in Fig. 4. The makers number of this new noviweldglass is 391 DM (blowing-room designation 39 J). As illustrated in Fig. 6, the infra-red transmission of the modern. Fig. 7 Corning glasses having marked opacity in the infra-red: A, Blue-green, heat absorbing; G 124 J andB=Gi24j. Curve C is G 124 J A; see Fig. 1. Cu
. Glasses for protecting eyes from injurious ,* Fig. 6 Corning New Noviweld glasses: Top curve=shade 30 per cent; second curve from top=shade 3; nextlower curve=shade 4K; bottom curve=shades 6 and 7. Thickness of glasses, ynyn which is given in Fig. 4. The makers number of this new noviweldglass is 391 DM (blowing-room designation 39 J). As illustrated in Fig. 6, the infra-red transmission of the modern. Fig. 7 Corning glasses having marked opacity in the infra-red: A, Blue-green, heat absorbing; G 124 J andB=Gi24j. Curve C is G 124 J A; see Fig. 1. Curve D is G 124 IP noviweld glasses is practically suppressed, so that the darkestshades (e. g., shade 6; and shade 7, not illustrated because its 14 Technologic Papers of the Bureau of Standards transmission curve coincides with that of shade 6) transmit onlyabout i per cent of the infra-red radiation emitted from a furnaceheated to 10500 C. These new noviweld glasses are unique fortheir great opacity to infra-red rays. The transmission curves of several glasses, made by the CorningGlass Works, and having marked opacity for infra-red rays, aresummarized in Fig. 7. The light-colored, greenish-blue glass,G 124 J, is obtainable, under the trade name Heat-absorbingglass. The transmission of another melt of G 124 J (markedG 124 J) is given in curve A, Fig. 7. Curve D gives the trans-mission of a deep brownish-yellow glass, G
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Keywords: ., bookauthor, bookauthorcoblentzww, bookcentury1900, bookdecade1910
