Tables 337-338. 

 INDEX OF REFRACTION. 



TABLE 337. — Index of Relractlon of Quartz (SIO2). 



281 



Except Rubens' values, — means from various authorities. 



TABLE 338. —Indices of Hefiactlon for various Alnms.* 



• According to the experiments of Soret (Arch. d. Sc. Phys. Nat. Geneve, 1884, 1888, and Comptes Rendus, 1885). 



t Ji stands for the different bases given in the first column. 



For (itlier alums see reference on Laudolt-Bornstein-Roth Tabellen, 



Smithsonian Tables. 



