BY MEANS OF THE RADIOMICROMETER. 



39 



is as much as 35 per cent more opaque than the solvent. At present 

 we can only conjecture as to the real cause of this effect. A shift 

 towards the violet would make the solution more opaque at the centers 

 of the bands; and although there is slight evidence of a shift in that 

 direction for the bands of sodium nitrate, it is not at all apparent in 

 the other bands. The curves do not bring out the characteristics in 

 general which would be expected if the solution bands were displaced 



90 



H : 



70 

 60 

 50 

 40 

 30 

 20 

 10 



a> 



C 







*i 



NH 4 Br 4.02 N 

 Oeplh 22mm. 



.90 



.95 



1.000 1.005 1.10 



FIG. 15. Wave-lengths. 



1.15 



1.20 



80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



NH 4 Br 4.02N 

 Deplh II mm. 



1.10 



1.15 



1.20 1.25 1.30 



FIG. 16. Wave-lengths. 



1.35 



1.40 



