The Absorption Coefficient of Solution for Monochromatic Radiation. 59 

 TABLE 23. Nickel Sulphate in Water (Figs. 21 and 22) Continued. 



NICKEL SULPHATE IN WATER. 



Eighteen solutions were prepared, varying in concentration from 

 c = 2.3 to c = 0.025. The A c curves show that A is a constant for 

 values of c greater than 0.6, and for values of c less than 0.6 that A 

 increases with dilution. This increase in A for the more dilute solutions 

 is common to all the wave-lengths studied. 



The five upper strips of plate 28 B of the paper by Jones and Ander- 

 son 1 indicate, though none too plainly, that for wave-lengths lying on 

 the short wave-length side of the red, nickel band A increases with 

 dilution for concentrations below c = 0.5. 



'Carnegie Inst. Wash. Pub. No. 110. 



