^88 Tables 442 and 443 



TABLE 442. — Transmission of the Radiations from a Gas-filled Tungsten Lamp, the Sun, 



a Magnetite Arc, and from a Quartz Mercury Vapor Lamp (no Globe) through 



Various Substances, especially Colored Glasses. 



Color. 



Greenish-yellow. . 



Smoky green 



Yellow-green 



Amber 



Orange 



Yellow 



Sage green 



Yellow-green 



Blue-green 



Black '..'.'.'..'. 



Neutral tint 



Gold plate 



" " (darker 

 Colorless 



Amethyst 



Purple 



Blue. 'I'.. ....... 



Blue, dark 



Blue-green 



Blue-green, pale . . 



Red-purple 



Blue-purple 



Red 



Colorless 



Brown 



Colorless 



Clear 



Trade name. 



Fieuzal, B 

 Fieuzal, 63 

 Fieuzal, 64 

 Euphos 

 Euphos, B 

 Akopos green 

 Hallauer, 65 

 Hallauer, 64 

 G 124, IP 

 Noviweld, 30% 

 Noviweld, shade 3 

 Noviweld, shade 4! 

 Noviweld, shade 6 

 Noviweld, shade 7 



Saniweld, dark 



G 34 



Noviol, shade A 



Noviol, shade B 



Noviol, shade C 



Ferrous No. 30 



No. 61 



Lab. No. 59 



G 124 JA 



Smoke, C 



Smoke, D 



Crookes, A 



Crookcs, B 



Pfund 



Pfund 



Lab. No. 58 



Lab. No. 57 



Shade C 



Electric smoke 



G 55 A 62 



Shade D 



G53 



G 171-IZ 



G584 



G 172 BW 5 



G585 



Selenium 



Flashed 



Window 



Crown 



Mica 



Mica 



Water 



Source.* 



A. O. C. 

 F. H. E. 

 F. H. E. 



B. S. 



B. &L. 

 J. K. 

 B.S. 



F. H. E. 



C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 



B.S. 



J. K. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W 

 A. O. C. 

 A. O. C. 



A. O. C. 

 C. G. W. 



B. & L. 

 B. &L. 

 A. O. C. 

 A. O. C. 

 A. O. C. 

 A. O. C. 

 A. O. C. 

 A. O. C. 

 A. O. C. 



A. O. C. 

 C. G. W. 



B. &L. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 

 C. G. W. 



Schotts 

 B. S. 

 B. S. 

 B.S. 

 B.S. 

 B. S. 

 B. S. 



Thick- 

 ness 

 in mm 



2.04 

 1.80 

 1.65 

 3-27 

 3-12 

 158 

 2.36 



1-35 

 2.81 



2.14 

 2. 20 



1.58 



1.89 

 2.85 

 2.09 

 251 

 321 

 3-75 

 4-93 

 3-13 

 2.90 



3-22 



I.85 

 1.56 

 I.30 

 O.O9 



10. o 



Transmission, per cent. 



Gas- 

 filled 

 tung- 

 sten. 



Quartz 

 mercury 

 vapor.f 



26.9 



34-3 

 22.0 

 25-0 



24.7 

 29.5 



17-7 



25-9 



o. 2 



7-8 



4.2 



15-2 



10.6 



17.0 



32. 2 



17-5 

 28.6 

 17-3 



21-5 



312 

 16.0 

 46. 1 

 32.0 



7-2 



1.3 

 40.0 

 51-9 

 44-3 



2. 2 

 17.0 

 20. 7 



3-9 

 41.7 



25. 2 



26. 5 

 34° 



7-9 



4.8 

 59- S 

 64.9 



35-4 

 43-1 

 J54-Q 



Mag- 

 netite 

 arc.t 



46.0 

 SS-o 



S3-0 



59-0 



2.7 



0.8 

 0.2 



430 

 56.0 



ii-S 

 12.5 

 52.0 

 39-° 



64.0 



65 



43 



Solar 

 radia- 

 tion. 



* A. O. C, Amer. Optical Co., Southbridge, Mass.; C. G. W., Corning Glass Works, Coming, N. Y.; B. & L., 

 Bausch & Lomb, Rochester, N. Y.; J. K.. Julius King Optical Co., New York City; F. H. E., F. H. Edmonds, optician, 

 Washington, D. C; B. S., Bureau of Standards; scrap material, source unknown. 



t Infra-red radiation absorbed by quartz cell containing 1 cm layer of water. Taken from Coblentz-Emerson & 

 Long, Bui. Bureau Standards, 14, 653, 1918. 



J Transmission of 1 cm cell having glass windows. 



TABLE 443. — Ultra-violet Transparency (302 m^) 



Bur. Standards Res. Pap. no. 113, 3. 629, 1929, gives data for vitaglass, sunlit, helioglass uviol-Jena, 

 neuglas, Corning Corex-D, quartz, celoglass, cellophane, tracing cloth. For various fabrics, see Res. 

 Pap. no. 6. For depth of penetration of various wave lengths (u. v., i. r.) see Spectral Characteristics 

 of Light Sources and Window Materials, Trans. Ilium. Eng. Soc, 23, 251, 1928. Average per cent 

 transmission of some glasses at 302 mfi when new and after 10 hr. exposure, distance 15 m, to no v 

 tungsten u. v. quartz Hg lamp and sun 5 to 12 m. Qualities vary from sample to sample of glasses. 



Smithsonian Tables 



