34 



WORK OF C. M. STINE 



hydrating powers, as seems very probable. Then a decrease in the number of ions 

 and a correspondingly large increase in the number of molecules of dissolved sub- 

 stance present, such as necessarily occurs owing to suppression of the ionization in 

 the mixture, would be accompanied by a change in the number of grams of water 

 combined. That this plays a part in the change noted seems very probable. 



P'or purposes of comparison these same values are given in table 20 for a few concen- 

 trations in the case of calcium chloride and magnesium chloride. The phenomena 

 are of the same kind. 



Table 20. Mixtures of Calcium Chloride and Magnesium Chloride. 



MAGNESIUM NITRATE AND STRONTIUM NITRATE. 



A pair of nitrates was next studied. 



The salts must be of such a nature as not to unite to form complexes when mixed, 

 and must have hydrating power. Magnesium nitrate and strontium nitrate were 

 selected. The data for these two salts are given in tables 21 to 23. 



Table 21. Magnesium Nitrate Data for Freezing-point and Conductivity Measurements, 



Weight-normal Corrections, and Hydrates. 



