BY MEANS OF THE RADIOMICROMETER. 



35 



solution had greater absorption than the solvent at the centers of the 

 bands. In the previous work in this field, by Jones and Guy, 1 two other 

 non-hydrated salts were studied (ammonium chloride and ammonium 

 nitrate), and these showed exactly the same phenomenon. It will be 

 remembered that for hydrated salts the solution was more transparent 

 in all cases except the nitrates. The transmissions for the solution of 

 potassium chloride are very nearly identical with those of water in the 



CaCI 2 ,4.78N 

 Depth 20 mm. 



0.9 



1.0 



1.05 1.10 



FIG. 11. Wave-lengths. 



1.15 



1.20 



CaCl 2 ,4.78N 

 Depth lOmm. 



1.05 



1.20 



1.25 1.30 



FIG. 12. Wave-lengths. 



1.35 



1.40 



'Carnegie Inst. Wash. Pub. No. 190; Phys. Zeit., 14. 279 (1913). 



