Tables 391 -393 359 



TABLE 391. — Index of Refraction of Glasses Made by Schott and Gen, Jena 



The following constants are for glasses made by Schott and Gen, Jena: n A , ;/ c , >i u , u?, ti G , are 

 the indices of refraction in air for A=o. 7682,11, 0=0.6563/11, D=o.5So/3, F=o.486i, G'^0.4341. 

 »=(«d — 0/(«f — «(.). Ultra-violet indices: Simon, Wied. Ann. 53, 1S94. Infra-red: Rubens, 

 Wied. Ann. 45, 1S92. Table is revised from Landolt, Bornstein and Meyerhofler, Kayser, tiand- 

 buch der Spectroscopie, and Schott and Gen's list No. 751, 1909. See also Hovestadt's "Jena 

 Glass." 



TABLE 392. — v n . Dispersion and Density of Jena Glasses 



No. and Type of Jena Glass. 



O 225 Light phosphate crown 

 O 802 Boro-silicate crown . 

 UV 3199 Uhra-violet crown 

 O227 Barium-silicate crown 

 O 1 14 Soft-silicate crown . 

 O 60S High-dispersion crown 

 UV3248 Ultra-violet flint . 

 O381 High-dispersion crown 

 O602 Baryt liaht flint . . 

 S 389 Borate flint . . . 

 O 726 Extra light flint . 

 O 154 Ordinary light flint 

 O 184 " " " 



O 748 Baryt flint . . . 

 O 102 Heavy flint 

 4 i " "... 

 O165 " "... 

 S386 Heavy flint. . . 

 S 57 Heaviest flint . . 



>i., for D 



1-5159 



1.4967 



!-5=>35 

 1-5399 

 i-5'5i 

 1. 5 1 49 

 1-5332 

 ..5262 

 1.5676 

 1.5686 

 1-5398 

 1.5710 

 1.5900 

 1.6235 

 1 .64S9 

 I-7I74 

 1.7541 

 1.9170 

 1.0626 



•00737 

 0765 

 0781 

 0909 

 0910 

 0943 

 0964 

 1026 

 1072 

 1 102 

 1142 

 1327 

 1438 

 1599 

 1919 

 2434 

 2743 

 4289 

 4882 



.00485 

 0504 

 0514 

 0582 

 °577 

 0595 



O'i. 1 



0644 

 0675 

 07 1 2 

 071 . 

 0819 

 0882 

 9965 

 1152 

 1439 

 1607 

 2451 

 2767 



0534 

 0546 

 0639 

 0642 

 0666 

 06S0 

 0727 

 0759 

 0775 

 08.0 



0943 

 1022 

 1142 

 1372 



1749 

 1974 

 3'°9 

 3547 



.00407 

 0423 

 0432 

 0514 

 0521 

 0543 

 0553 

 0596 

 0618 

 0629 

 0669 

 079 1 

 0861 

 0965 

 u So 

 1521 

 1730 

 2S08 

 3252 



Specific 

 Weight. 



2.58 

 2.38 

 2.41 

 2 73 



2 55 

 2.60 



2-75 

 2.70 

 3.12 

 2. S3 

 2.S7 

 3-.6 

 3-28 



3 67 

 3.87 

 4-49 

 4.78 

 6.01 

 6-33 



Smithsonian Tables. 



Pulfrich, Wied. Ann. 45, p. 609, 1892. 



