CENTRAL NERVOUS SYSTEM. 



•279 



during the first year, and vigorous for the first seven or eight years, after 

 which it becomes comparatively slow. The maximum weight is indicated 



in the fifth decade (males), fourth (females), although there is a "premaxi- 

 mum" in the middle of the second decade (at thirteen and fifteen years for 

 males and fourteen years for females), in which the too early and too vigorous 



