Table 186. 



INDEX OF REFRACTION. 



Indices of Refraction for Uie vaxlons Alums.* 



* According to the experiments of Soret (Arch. d. Sc. Phys. Nat. Genfeve, 1884, 18 

 t /f stands for the different bases given in the first column. 



Smithsonian Tables. 



180 



8, and Comptes Rendus, 1885). 



