98 THE GROWTH OF THE BRAIN. 



On examining this table we find the following facts 

 for consideration. In the case of the males the weight 

 of the encephalon regularly decreases with each period 

 of years. It decreases also when cases belonging 

 to the same groups, according to age, are compared 

 according to their stature, the tallest individuals having 

 the heaviest encephalon and the shortest the lightest! 

 Examining next the different subdivisions of the en- 

 cephalon, it appears that except in a few instances the 

 same general statements hold good. Where an entry 

 does not have the value anticipated when the brains are 

 compared according to stature, the fact is indicated by 

 the insertion of a small s, and where it fails to conform 

 when the comparison is made according to age it is 

 indicated by a small a. Thus to be explicit, in the case 

 of males of intermediate stature the figures for those 

 between 71-90 years do not conform in the case of the 

 cerebellum and the stem, whereas among the shortest 

 individuals those between 41-70 years fail to conform 

 in the case of the cerebellum alone. In the case of the 

 figures for the females it is found that the same general 

 statements hold good, save that the number of excep- 

 tions is larger. These latter are indicated in the same 

 way, and it is hardly necessary to enumerate them in 

 detail. As has been stated the observations on the 

 females are based on a smaller number of cases, and 

 it is especially in the groups where the number of 

 individuals is probably least that the deviations of the 

 general relations occur. We may conclude from these 

 tables that a_ft@r maturity the encephajon in the female- 

 is smaller than in the male, and that a.11 its parts are- 

 smaller. When the observations are grouped according 

 to age, they show that with increasing age there is a 

 decrease in weight of the encephalon and in all its. 

 parts ; th^t for those pf the same age and sex decrease- 



