MEASUREMENT OF VARIABLE PROPERTIES 133 



pairs of facial values have been calculated a priori. From 

 Table C (p- 131) the observed frequencies may be deduced. 

 In Table ^ (p. 132) both series of relative frequencies are 

 compared : 



Although the above concordance is hardly satisfactory 

 (because the casts are not numerous enough), it is sufficient to 

 prove that the calculated figures, however capricious they seem 

 to be, are the expression of really existing rules of chance. 



In Example (B) (§ 102, p. 129) the first figure of each pair has 

 been divided by the second. The thirty-six quotients have 

 been brought into seven groups and the frequency of each group 

 has been calculated. The calculated and the observed fre- 

 quencies (deduced from Table i) are compared in Table t : 



Table t (Quotients) 



With regard to the colours mentioned in Example (C) (§ 102, 

 p. 130) a comparison between the calculated and the observed 

 values (deduced from Table f) is given in Table k : 



Here the concordance is as satisfactory as possible. 



In Example (D) (§ 102, p. 130) the frequencies of the three 



