Raymond Pearl 
or 
11. Brain-xoeight and Skull Characters. 
As was to be expected the correlation of brain-weight with the skull length 
and breadth gives the highest values for the coefficients of any of the correlations 
dealt with. In fact one would predict on general grounds, I think, a somewhat 
closer degree of correlation between these characters than is actually found in the 
Bohemian statistics. It is likely, however, that the values here obtained (Table 
XVII) are lower than they should be on account of the methods used in measuring 
skull length and breadth. As has been fully described above (p. 18) these 
measurements were taken on the horizontal cut surfaces after the dome of the 
skull had been removed by sawing around it. This is clearly not a very precise 
way in which to get skull measurements. In order to show so far as may be what 
has been the effect of this procedure I have prepared the following tables com- 
paring the various constants of the Bohemian skull length and breadth series 
with other well-known cranial series. Taking first the means we have : 
Eace 
Skull Length 
Skull Breadth 
6 
? 
9 
Bohemians 
Wliitechapel English*... 
Altbayerischt ... 
Wiirtemburger t 
176-547 
189-06 
180-58 
179-48 
170-142 
180-36 
173-45 
172-74 
149- 841 
140-67 
150- 47 
147-88 
144-953 
134-68 
143-98 
142-90 
The means give reasonably accordant values considering that the Bohemians 
are a markedly brachycephalic race. Turning next to the coefficients of variation 
we have : 
Race 
Skull Length 
SkuU Breadth 
? 
? 
Bohemians 
4-173 
3-233 
4-441 
3-815 
Whitechapel English I ... 
3-31 
3-45 
3-75 
3-54 
Bavarian § 
3-37 
3-57 
3-89 
3-39 
French II ... 
3-97 
3-65 
4-21 
3-67 
NaqadalT 
3-17 
3-14 
3-29 
3-45 
Aino§ 
3-20 
3-08 
2-76 
2-68 
* Macdonell, Biometrika, Vol. m. pp. 208, 209. 
t AHce Lee, Phil. Trans. Vol. 196, A, pp. 225—264. 
X Macdonell, loe. cit. p. 220. 
§ Lee, loc. cit. 
II Unpublished reduction of Measurements in Broca's MS. by C. D. Fawcett. 
H Miss Fawcett, Biometrika, Vol. i. pp. 438 and 4.5G. 
9—2 
