98 ENGLISH MEN OF SCIENCE. [CHAP. 



during fatigue. In mind Energetic as far as 

 health permits. Much occupied professionally, 

 but when well, capable of vigorously following up 

 the science of .... in leisure hours. 



"Father Energetic in body as far as his 

 health allowed ; in mind, very energetic. His 

 brain-work from an early age was very large in 

 amount, and he was vigorous and sanguine about 

 anything he undertook. Mother Very languid ; 

 incapable of any bodily exertion. Very little 

 energy of mind; too languid to take much in- 

 terest in anything beyond her own family." 



SIZE OF HEAD. 



I may mention that energy appears to be 

 correlated with smallness of head, a fact which 

 is well illustrated here, although the average 

 circumference of head among the scientific men 

 is great. Energy is also, as we have seen, 

 strongly marked among them ; but it is much 

 more strongly marked among those who have 

 small heads. I have ninety-nine returns, many 

 of which I have verified myself, using the hat- 



