Thomas Dwight 23 



Head of Humerus, vertical diameter. 

 In the 36 smallest male. In the 51 largest female. 



" 94 " 1 " " 85 " 1 " • 



" 133 " 4 " " 111 " 3 " 



" 171 " !> << " 135 " 3 



" 165 " 10 



Head of Humerus, transverse diameter. 



In the 55 smallest male. In the 42 l.ii-t!;est female. 



" 94 " 2 " " 09 " 1 " 



" - 126 " 3 " " 107 " 3 " 



<< 155 " 7 " " 139 " 5 " 



" 177 " 9 " 



Head of Femttr, greatest diameter. 

 In the 36 smallest male. In the 51 largest female. 



S3 " 1 " " 107 " 1 " 



" 119 " 4 " '< 133 " 3 



154 .1 G " " 168 " 17 



Continuing this line of comparison I was anxious to divide the bones 

 into a smaller and a larger half, and to see how many male bones were 

 among the 200 smaller and how many female among the 200 larger, 

 taking each of these diameters successively. Unfortunately the groups 

 did not allow this division to be made without putting some of a group 

 of equals into the smaller and some in to the larger half. It seems to me 

 that this can be done very properly; but that all may judge of this for 

 themselves I give the process in detail. Thus in the vertical measure- 

 ments of the head of the humerus there were 204 bones measuring 45 mm. 

 and less, and 196 measuring more than 45 mm. The number measuring 

 45 mm. was nearly equal in both sexes, there being 16 male and 17 female. 

 Thus if 4 of this group, 2 of each sex, were transferred from the smaller 

 bones to the larger, there would be two divisions of 200 each, obtained by 

 the transfer of only 1 per cent of the whole. In the smaller 200 there 

 would be 23 (11.5 per cent) of the male and 177 (88.5 per cent) of tlie 

 female. In the second half these figures would be reversed. In the 

 series of the transverse diameter of the head of the humerus there were 

 191 bones measuring 41 mm. or less and 209 measuring more than 41 

 mm. Among the male bones were 14 of 42 mm., and among the female 

 18; by transferring 9 of these, 4 male and 5 female (2.25 per cent of 

 the whole), to the smaller bones, we had 200 in each division arranged 

 as follows: In the smaller 200 there were 22 male (11 per cent), and 

 178 female (89 per cent). In the larger 200 these figures were reversed. 

 In the case of the head of the femui- there were 195 of 46 mm. or 

 less, and 205 of more than 46 mm. There were 37 measuring 47 mm., 

 of which 22 were male and 15 female. By transferring 3 male and 2 

 female from the larger to the smaller bones, we once more have 200 



