1 84 



TABLES 171-174. 

 INDEX OF REFRACTION. 



TABLE 171. Index of Refraction of Fluorite in Air. 



"+^-* *-/*<r=^^ 



where a 2 = 2.03882 

 ^/i = 0.0062 1 83 

 Ai 2 = 0.007 706 

 <? = 0.0031999 



/= 0.0000029 1 6 

 p = 6.0965 1 

 1/2 = 0.0061386 

 ^ = 0.00884 



1=5114.65 



A r 2 =i26o.56 

 At, = 0.0940^ 



(P) 



TABLE 172. Change of Index of Refraction for 10 in Units of the 5th Decimal Place. 

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



TABLE 173. -Index of Refraction of Iceland Spar (CaC0 3 ) 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 Pulfrich, Wied. Ann 45, 1892. 



RA Rubens-Aschkinass, Wied. Ann. 67, 1899. 



S Starke, Wied. Ann. 60, 1897. 



TABLE 174. Index of Refraction of Nltroso-dlmethyl-anlline. (Wood.) 



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



Phil. Mag. 1903. 



SMITHSONIAN TABLES. 



