SOCIETY OF THE UNIVERSITY OF ABERDEEN. 201 



is a small though definite correlation between large size of head and 

 intelligence, and that the large size of head is not only actual, but is 

 proportional to the stature and weight of the individuals. Thus it 

 will be seen on looking at Table XI., showing the average measure- 

 ments and weights of medical students studying at the Middlesex 

 Hospital and King's College, London, that the more intellectual, 

 which are grouped in Class A, have larger heads and are slightly 

 heavier than Class B, which are of average intelligence, and that those 

 in Class B have larger heads and are both slightly taller and slightly 

 heavier than Class C, which are intellectually below the average. The 

 proportion, however, that the size of the head bears to both the 

 stature and the body-weight progressively increases in passing from 

 the less to the more intellectual classes. This is shown in Table XI., 

 which gives the proportion under the headings " Capitulo-statural " 

 index and " Encephalo-somatic " index. The former is an index of 

 the proportion that the size of the head bears to the stature and the 

 latter the ratio of the calculated brain weight to the body-weight. 

 We may say, therefore, that these figures indicate that the more 

 intellectual are not only finer specimens of humanity, but that they 

 have both actually and proportionally to the size of their bodies larger 

 heads than the less intellectual. It will be seen also on looking at the 

 columns in Table XII., that the cephalic breadth-indices are approxi- 

 mately the same in the three groups, but that there is a progressive 

 increase in the proportional height of the head in passing from Class 

 C to Class A. 



It will be necessary to mention here that irregularities in the form 

 of the skull are often attributable to abnormal or unequal growth of 

 the brain in certain directions, .//., enlargement of the occipital region 

 of the skull. " Bathrocephalus " is apparently in some cases due to 

 hypertrophy of the occipital lobes of the brain, which, as has been 

 pointed out by Elliot Smith, is often unsym metrical, the left occipital 

 lobe being larger than the right. Other irregularities of the skull, 

 due to asymmetry in the growth of the brain, have also been de- 

 scribed. 



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