338 Prof. K. Pearson On the Correlation of Intellectual 

 The following tables resulted from this classification : 

 (a.) Cephalic Index. 



The correlation deduced from this table between ability as measured 

 by the teacher and dolichocephaly is r = 0'0052 0-0240. 



(b.) Length of Head. (Reduced to 12th year.) 



The correlation, therefore, between short heads and ability is 

 r = -0-0437 0-0242. 



((.} Breadth of Head. (Reduced to 12th year.) 



The correlation, therefore, between ability and broad heads is 

 r = 0-0843 0-0240. 



