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- 



