The Absorption Coefficient of Solution for Monochromatic Radiation. 53 



greatly increased in height. In the curve for the propyl-alcohol 

 solution the positions and relative height of the two peaks are much 

 the same as in the case of the ethyl-alcohol solution. 



In this connection a paper by T. R. Merton 1 deserves mention. 

 The absorption curves for solutions of uranous chloride in various 

 solvents were drawn, and the bands were shown to undergo interesting 

 modifications, depending on the solvent used. Of course the cases of 



/ Curve I -NiC! 2 mH 2 0; c=.5 

 " n-NiCI 2 -6H 2 OinCH 3 OH 

 " JH- " "C 2 H 5 OH 



IV- - C 3 H 7 OH 



V-NiCI 2 -6NH 3 inH 2 



600 



700 



800 



900 



1,000 



1,100/4/4 



FIG. 18. Comparison of the Absorption Curves of Nickel Salts in Water and the 



Alcohols. 



the uranous chloride and the nickel chloride hydrate solutions are not 

 exactly comparable, for the uranous chloride actually does dissolve 

 in the solvents, and in the light of other work we are not surprised at the 

 difference in the character of the bands, but the nickel chloride goes 

 into solution in the alcohols only in the presence of water. Under such 



Roy. Soc. A, 87, 138 (1912). 



