BREWSTER. — RANGE OF VARIABILITY. 



275 



the distribution of individual variations. To sliow the connection between 

 individual variations and racial ditfei'ences, I take all possible pairs of 

 coefficients in the first nine columns of Table A and compare them with 

 the corresponding pairs in the last colunui. When, in one of the tirj;t 

 nine columns, the member of a pair which is larger is larger in the tenth 

 column also, it counts one in the line at the bottom of Table A marked 

 " Cases of Agreement." When, however, the larger member of a pair 

 in one column is the smaller in the other, it counts one in the line marked 

 '• Cases of Disagreement." For example, in the column of Slavs, the 

 G.V. of the head length is 0.0314, that of the head breadth is 0.0345, 

 the head breadth being the more variable. In the column of racial dif- 

 ferences also, the C. V. of the head breadth is greater than that of the 

 head length; therefore this gives in column of Slavs one "Case of 

 Agreement." On the other hand, for the Slavs, the heights of the fore- 

 head and of the nose do not agree in relative variability with the means 

 of the twenty races given in the last column ; consequently this compari- 

 son gives a " Case of Disagreement." 



TABLE B. 

 Showing Order of Magnitude of C. V. of Table A.* 



* I. e. in column "20 Races," head length has C. V. smallest; head breadth, next 

 larger; C. V. of nose height is largest. 



