RESULTS OBTAINED. 



13 



The boiling-point data are plotted in curves, fig. 11. The ordinates 

 are molecular elevations of the boiling-point, and the abscissae are concen- 

 trations of the solutions in terms of a gram-molecular weight of the dis- 

 solved substance in 1,000 grams of the solvent. In the few boiling-point 

 curves that are given, there is a more or less marked minimum, but, as has 

 already been pointed out, no great reliance can be placed upon the results 

 obtained by the boiling-point method. 



The results of refractivity measurements are given in figs. 12 and 13. The 

 indices of refraction are ordinates, and the concentrations in terms of normal 

 are abscissae. The curves are nearly all straight lines, showing no irregularity 

 at any of the concentrations studied. 



1.36 



71 

 1.35 



X 



o 



o 



1.34 



ro 

 * 



I.3ZJ III 111 



UG 



z co 



^d 



Nc 



CI 



O.I 0.3 



m z 

 Concentration 

 FIG. 12. 



1.36 



n 



1.35 

 1.34 



1.33 

 I.3Z 



,PQ 



O.I 0.3 0.5 



77Z- ^ 



Concentration 



FIG. 13. 



