102 THE GROWTH OF THE BRAIN. 



was opened by examining the weight of the brain after 

 the twentieth year, when the most active growth changes 

 have ceased. This was done since it seemed desirable 

 to make the conditions found in the adult the point of 

 departure, but the changes accompanying the increase 

 of weight and volume during the first twenty years of 

 life are still to be discussed. 



