BY MEANS OF THE RADIOMICROMETER. 



29 



90 



1 mm. of water. This procedure saved in this case the necessity of 

 making a series of measurements with the solvent. 



Magnesium nitrate presented so many peculiarities that the work 

 with this salt was repeated three times, starting in every case with a 

 new solution. The same general results were always obtained. The 

 curve for the l/i band (fig. 13) was plotted from data not recorded in 

 this paper. The concentration of the solution was 3.80 normal, and, 

 as in other cases, 21 mm. of solution were placed in one cell and 1 mm. 



80 



H,0 



70 



g 60 



50 



v\ 



a 40 



c3 



43 



8 



g 30 

 



20 



10 



Mg S0 4 ,2.I4N 

 Depth 20mm. 



0.9 



0.95 



1.0 



1.05 1.10 



FIG. 5. Wave-lengths. 



1.15 



1.20 



80 



70 



. 60 



a 



.2 



IK 



.2 50 



a 

 | 



J3 40 



o 



I 



fl 30 

 so 



1 



^ 20 



10 



Mg S0 2 14 N 

 Depth 10 rnm. 



1.1 



1.15 



1.20 1.25 1.30 



FIG. 6. Wave-lengths. 



1.35 



140 



