450 



Scientific Froceedings, Royal Dublin Society. 



Taki,e II. 



Ilex aquifolium : Leaves. 



On comparing the curves in fig. 2 with those of Syringa in fig. 1, one is 

 immediately struck with the complete difl'erenee in the nature of the two. 

 In the first place, there appears in the lowest graph no steady rise in the 

 concentration of the electrolyte such as is seen in that of Syringa. We 

 would, however, fall into grave error were we to interpret this as indicating 

 that there is no concentration of electrolytes with age in Ilex. As we shall 



