i86 



TABLES 189-192. 



INDEX OF REFRACTION. 



TABLE 189. - Index of Refraction of Fluorite in Air. 



where a 2 = 2.032 

 ^ = 0.0062183 

 Ai' 2 = 0.007706 

 <? = 0.003 1 999 



/"= 0.00000291 6 



2 = 6.09651 

 M-2 =0.0061386 

 A V 2 = 0.00884 



A r 2 =i26o.5 



(P) 



TABLE 190. Change of Index of Refraction for 1 in Units of the 6th Decimal Place. 

 C line, 1.220 ; D, 1.206; F, 1.170; G, 1.142. (PI) 



TABLE 191. Index of Refraction of Iceland Spar (CaCOj in Air. 



C Carvallo, J. de Phys. (3), 9, 1900. 



M Martens, Ann. der Phys. (4) 6, 1901, 8, 1902. 



P Paschen, Wied. Ann. 56, 1895. 



PI 



RA Rubens-Aschkinass, 



S Starke, Wied. Ann. 60, 1897. 



Pulfrich, Wied. Ann 45, 1892. 



Wied. Ann. 67, 1899. 



TABLE 192. Index of Refraction of Nitroso- dim ethyl- aniline. (Wood.) 



Nitroso-dimethyl-aniline has enormous dispersion in yellow and green, metallic absorption in violet. See Wood, 



Phil. Mag 1903. 

 SMITHSONIAN TABLES. 



