1 84 



Tables 171-174. 

 INDEX OF REFRACTION. 



TABLE 171. — Index of Refraction of Flnorlte In Air. 



a2 + 



Ml 



Afi 



where a^ = 2.03882 

 i1/i = 0.0062183 

 Xi2 = 0.007706 

 ^ = 0.0031999 



■' A- — A« 



/= 0.000002916 



^2 = 5.09651 

 M2 =0.0061386 

 X,2 = 0.00884 



r+ 



Mz 



A,2_A,2 



y1/3= 5114.65 

 Ar^= 1260.56 



At, = 0.0940/ii 

 ^-• = 35-5M 



(P) 



TABLE 172. — Change of Index of RefTaction for 1°C In Units of tlie 6tli Decimal Place. 

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



TABLE 173. — 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, 190a. 



P Paschen, Wied. Ann. 56, 1895. 



PI Pulfrich, Wied. Ann 45, 1892. 



RA Rubens-Aschkinass, Wied. Ann. 67, 18 



S Starke, Wied. Ann. 60, 1897. 



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



Phil. Mag. 1903. 



Smithsonian Tables. 



