492 
The Measurements of the Pelvis 
is the height of the hip bone. This can be taken in the sitting posture as already 
indicated. Since it is one of the measurements most highly correlated with both 
the diameters under consideration, it will have to be taken into account in working 
out the formulae from which these diameters are to be found. Its coefficients of 
correlation with the diameters most closely correlated with the obstetric conjugate 
(diagonal conjugate) and the transverse diameter (inter-cristal and inter-spinous) 
will therefore be required. These have been calculated for both hip bones. 
Eight hip — Left hip — 
height height 
Diagonal conjugate -63 ±'03 -64 ±'03 
Inter-crests -56 ±'03 -57 ±-03 
Inter-spines -44 ±-04 -46 ±"04 
Apart from the closeness of the figures on the two sides these results call for 
no particular notice. 
As a matter of anthropological interest the relationship of the bone measure- 
ments to one another was studied, and a table of the coefficients of correlation 
drawn up on a plan similar to that employed for the diameters. The correlation 
is greater between corresponding measurements of the hip bones on the two sides 
than between the height and length of the same bone. Thus the heights of the 
two hip bones have a coefficient "98 and the breadths a coefficient "94, while that 
for the height and breadth of the right hip bone is - 78 and for the same measure- 
ments on the left side '81. This closer relationship between corresponding 
measurements on the two sides than between measurements on the same side 
has been noted by previous observers for other bones*. The crossed correlation 
between the height of one bone and the breadth of the other is not very different 
from the direct correlation between the height and breadth of the same bone, 
e.g. height of right hip bone with breadth of left bone gives a coefficient '79, 
height of right bone with breadth of right bone a coefficient "78, height of left 
TABLE III. 
Eight hip — 
height 
Eight hip — 
breadth 
Left hip — ■ 
height 
Left hip — 
breadth 
Sacrum — 
height 
Sacrum — 
breadth 
Right hip — height ... 
1 
•78 
•98 
•79 
•34 
•59 
+ -02 
+ •002 
+ -02 
+ -04 
+ -03 
Right hip — breadth . . . 
■78 
1 
•77 
•94 
■31 
•55 
+ -02 
+ -02 
+ -005 
+ -04 
+ ■03 
Left hip — height 
•98 
•77 
1 
•81 
•37 
•61 
+ -002 
+ -02 
+ -02 
+ •04 
+ -03 
Left hip — breadth ... 
•79 
■94 
•81 
1 
•30 
■58 
+ -02 
+ -005 
+ '02 
+ -04 
+ -03 
Sacrum — height 
•34 
•31 
■37 
•30 
1 
•32 
+ -04 
+ -04 
+ -04 
+ -04 
+ -04 
Sacrum — breadth 
•59 
•55 
•61 
•58 
•32 
1 
+ -03 
+ -03 
+ -03 
+ "03 
±•04 
* Lewenz and Whiteley, Biometrika, Vol. i. p. 345, 1902. 
