899 



The result of the investigation is given in table II and in dia- 

 gram I. 



Especially from the latter one observes immediate!}' that the result 



I j (Cd 804)3 8H2O 



TABLE 1. 



64.1 

 85.5 

 128.3 

 192.4 

 256.6 

 384.9 

 513.2 



6.0 

 12.0 

 19.0 

 31.3 

 37.7 

 39.3 

 39.3 



of our preliminary observations has been entiiely affirmed. 



It is clear that magnesium in fact belongs to the group of the 

 alcaline earth metals and that on the other hand zinc, cadmium, and 

 mercury form a natural group. 



Though the curves for calcium and zinc run closely beside one 

 another, they bear no relation to each other in reality. 



