The*Absorption Coefficient of Solution for Monochromatic Radiation. 49 

 TABLE 18. Nickel Chloride in Water (Figs. 16 and 17) Continued. 



Houstoun has measured two solutions of nickel chloride in water. 

 His values are shown in table 19 for the sake of comparison, and it is 

 seen that the two sets of values are not greatly at variance. 



TABLE 19. A for Nickel Chloride in Water. 



Houstoun's values indicate that A decreases considerably with 

 dilution, which is contradictory to the results of the present work. 

 Plate 25 of the paper by Jones and Anderson 1 would seem to indicate 

 that A is very nearly constant, possibly decreasing slightly with dilution, 

 for wave-lengths on the short wave-length side of the red absorption 

 band. However, they state that the photographic method, such as 

 they used, is not the best method for studying a band whose edge is 

 hazy and not sharply defined as is the case for this nickel band. 



Carnegie Inst. Wash. Pub. No. 110. 



