BY MEANS OF THE RADIOMICROMETER. 



37 



temperatures combined with the dissolved substance. Only 35 per 

 cent of all the water present is, therefore, acting as solvent water. 



All of the solutions which we studied were of much greater concen- 

 tration than the above. Since the total amount of water combined 

 with the dissolved substance increases with the concentration of the 

 solution, the percentage of combined water was greater than 65 in the 

 solutions with which we worked. It has been pointed out that only 4 



90 



80 



70 



60 



50 



>40 



30 



20 



V 



10 



MS ( NO,); 3.80 N 

 Depth 20mm. 



.90 



.95 



1.00 1.05 1.10 



FIG. 13. Wave-lengths. 



1.15 



1.20 



on 



Percentage transm 



Mg(N0 3 ) z 3.68N 

 Dep-th 10.9mm. 



1.10 



1.15 



1.20 



1.25 1.30 



FIG. 14. Wave-lengths. 



1.35 



1.40 



