Academy of Sciences] 

 No. 3] 



MEASUREMENTS 



./ Mean Height Index of the Head 



43 



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The figures show, first of all, a close agreement in the relative values of the height in the 

 members of both series in the Academy, and a fairly close one between these and the outside 

 old Americans. The slight differences that there are between the academicians and the old 

 Americans at large express what has already been seen imder the individual measurements. 

 The relative value of the head height is slightly larger in the outsiders than in the members, 

 especially the members of old American derivation. This means simply that in the members, 

 where the length and breadth of the head had augmented beyond the norms of these dimensions 

 in the outsiders, the height of the head lagged slightly behind. The height-length and height- 

 breadth indices show only that the breadth of the head in the academicians increased slightly 

 more even than the length. 



The scrutiny of the main relative proportions or indices of the head in the academicians 

 may briefly be summarized thus: 



In both the cephalic and the head-height indices the two series of the members of the Acad- 

 emy show some differences, the not old Americans being more broad-headed and also slightly 

 more high-vaulted in relation to head length and even to the mean of length and breadth. In 

 their turn the old Americans of the Academy are relatively somewhat more broad-headed but 

 slightly less high-vaulted relatively to head length, as well as the mean of head length and 

 breadth. Thus it is seen once more that the greater size of the head in the academicians was 



