Tables 440 and 441 387 



TABLE 440. — Transmissibility of Radiation by Jena Ultra-violet Glasses 



TABLE 441. — Transmissibility of Radiation by American Glasses 



The following data giving the percentage transmission are selected from Coblentz, Emerson and Long, 

 Bull. Bureau Standards, 14, 653, 1918. 



Glass or substance, manufacturer 



Thick- 

 ness, 

 mm. 



Wave lengths in ft 



Purple fluorite 



Gold film on Crookes' glass 

 " " " crown glass. . 



Molybdenite 



Cr 2 (S0 4 ) 3 -i8 H 2 



Chrome alum, 10 g to 100 g 

 H 2 



C0CI2, 10 g to 100 g H 2 0. . 

 Glasses: 



Copper ruby, flashed 



G24, Corning, red, No. 243 



Schott's red, No. 2745 



G34, Corning, orange, 

 No. 349. 



Pyrex, Corning, No. 774. . . 



Noviol, B, Corning, yellow. 



Novieweld 3, Corning, 

 dark-yellow 



Schott's 431 1 1, green 



G1710N, green, Corning. . . 



G174J, Corning, heat 



absorbing 



G124JA, Corning 



Cobalt blue 



Schott's F3086, blue 



G4013, Corning, blue 



G584, Corning, blue, blue- 

 green, No. 428 



G1711Z, Corning, pale- 

 blue-green 



Amethyst, G172BWB, 

 Corning 



G172BW5, Corning, 



red-purple 



Crookes' A, A. O. Co 



Crookes' sage green 30, 

 A. O. Co 



Lab. 58, A. O. Co 



Fieurzal B, A. O. Co 



Akopos green, J. K. O. Co. 



.007 

 .24 



22 



34 

 o 

 o 



2 



43 



11 



6 



5 



43 



58 



36 



90 



80 



12 

 50 



52 



3-70 

 3-23 

 2. II 



4-43 

 1 .96 



55 



90 



50 



~r- 



59 

 76 



4i 

 83 



73 

 50 



50 

 60 



83 



50 

 90 



75 



1 



4 

 1 



2 

 o 



74 

 o 

 o 



o 



23 

 91 



o 



92 



o 

 86 

 76 

 9i 



3 



43 

 63 



o 

 o 



64 

 70 



62 

 90 

 60 



2 



53 

 23 



4 

 1 



43 

 1 



15 



24 

 60 



9i 



o 

 9i 



o 



91 



80 



91 



47 



1 



2 



44 



37 



o 

 o 



72 



72 



67 

 91 

 82 



6 

 79 



53 



12 

 5 



63 

 2 



50 



60 

 74 

 9i 



2 

 90 



4 

 9i 



82 



9i 



48 



1 



1 



46 



11 



48 

 1 

 1 



46 

 o 



57 

 o 

 o 



47 

 o 



60 

 o 



02 



o 

 o 



48 







76 

 65 



75 



68 

 87 



75 



13 

 83 

 68 



19 

 10 



79 

 31 

 61 



75 

 78 



5 

 83 



81 

 90 



40 



2 



10 



15 

 35 

 23 



6 



25 



1 1 

 3 

 36 

 11 

 11 



45 

 45 



4-? 



6 

 38 



51 



30 

 70 



33 



1 



10 



3 

 13 



4 



7 

 9 

 9 



4 



5 



27 



5 

 1 



20 



13 

 20 



23 



35 

 20 



52 



36 

 o 

 o 



1 



7 

 4 



7 

 o 



6 

 6 



2* 



4 

 2 



20 



12 



25 



12 

 27 



11 

 38 



25 

 5i 



7 

 o 

 o 



o 



2 

 O 



I 

 O 

 O 



o 

 o 

 o 

 o 

 o 



I 



I 



7 



2 



5 



3 



7 

 2 



10 



62 

 o 

 o 



Manufacturers: Corning Glass Works, Corning, N. Y.; A. O. Co., American Optical Co., South- 

 bridge, Mass.; J. K. O. Co., Julius King Optical Co., New York City. For other glasses see original 

 reference. See also succeeding table, which contains data for many of the same glasses. For Corning 

 Filters: Journ. Opt. Soc. Amer. 17, 40, 1928; Coblentz, Stair, Bur. Standards, Tech. Pap. 369, 1928; 

 Sci. Pap., 113, 1929. Corning, Heat Transmitting, no. 254, 1 mm. transmits over 30%, 0.8 to 4/1; 

 Sextant red, 2 mm. over 30% 0.8 to 4.2/4; Red Corex A, G986A, 3 mm., U. V. freely, visible to 0.411, 

 i.r. with max. at 0.7 and 2.6/1. 



Smithsonian Tables 



