VII.] 



DISCUSSION OF THE DATA OF STATURE. 



113 



angles, therefore the two Squadrons must stand at right 

 angles to one another, as in Fig. 14. The upper surface 

 of A is curved in rank, and horizontal in file ; that of 

 Z is curved in file and horizontal in rank. 



The Kinsmen in nearer degrees than Z will be re- 

 presented by Squadrons whose forms are intermediate 

 between A and Z. Front views of these are shown in 



FiG .15 



Fig. 15. Consequently they will be somewhat curved 

 both in rank and in file. Also as the Kinsmen of all 

 the members of a Population, in any degree, are them- 

 selves a Population having similar characteristics to 

 those of the Population of which they are part, it 

 follows that the elements of every intermediate Squadron 

 when they are broken up and sorted afresh into ordinary 

 Schemes, would form identical Schemes. Therefore, it 

 is clear that a law exists that connects the curvatures in 

 rank and in file, of any Squadron. Both of the cur- 

 vatures are Curves of Distribution; let us call their 

 Q values respectively r and /. Then if p be the Q of 



