476 Journal of Comparative Neurology and Psychology. 



tive throughout, denoting that generally with any deviation 

 from the mean in stature, there is associated a deviation in the 

 same sense from the mean brain-weight. The regressions are 

 sensibly linear. The coefficients of correlation between brain- 

 weight and stature and brain-weight and age are of the same 

 general order of magnitude, or, in other words, weight of brain 

 is only slightly more closely associated with size of body (as 

 measured by stature) than it is with age. The relations of stat- 

 ure and age to brain-weight are very clearly shown in the char- 

 acteristic equations (vide infra, p. 478). 



7. Brain-zveight and Body-weight. The correlation of 

 brain-weight with body-weight is positive, and of about the 

 same degree as the correlation of the former with stature. The 

 regression approaches somewhat more closely to strict linearity 

 in the case of body weight than in the case of stature. A unit 

 change in body weight is associated with a smaller change in 

 brain-weight than is a unit change in stature. 



8. Brainiveight and Skull Characters. The correlations 

 between brain-weight and skull length and skull breadth are pos- 

 itive and give the highest values for the coefficients of any of 

 those studied. For certain reasons discussed in the complete 

 paper it seems possible that the values obtained for these corre- 

 lations from the Bohemian statistics are still somewhat too low. 

 The regressions are sensibly linear. The correlation between 

 brain-weight and skull length and breadth is somewhat less close 

 than that between skull capacity and length and breadth. This 

 is shown in Table VI. 



TABLE VI. 



»MaCDONELL, :04. 



^Fawcett, :02. ^Lee and Pearson, :oi. 



