TABLE 186. 



INDEX OF REFRACTION. 



Indices of Refraction for the various Alums.* 



* According to the experimenits of Soret (Arch. d. Sc. Phys. Nat. Geneve, i88 4 , 1888, and Comptes Rendus, 1885). 

 t A" stands for the different bases given in the first column. 



SMITHSONIAN TABLES. 



1 80 



