232 Mr. E. Warren. 



FIG. 6. R. Antero-lateral and E. Dentary. r = 0'80. 



Dotted line is the r line inclined to axis x at tan" 1 0*80. The continuous line join- 

 ing the crosses is the line found on taking the R. antero-lat. as subject. The 

 circles indicate the points obtained when the R. dentary is the subject. The 

 probable errors of the dimensions are represented by intervals, 1, 2, 3, &c., on 

 both horizontal and vertical scales. 



taking one dimension as the subject and the other as the relative, then 

 for every unit of deviation of the subject the mean of the associated 

 values of the relative was found. The values of the subject and the 

 associated mean values of the relative are expressed in terms of 

 their probable errors, and plotted along the axes of y and x respec- 

 tively. The points indicated by circles were obtained by reversing 

 the positions of subject and relative. 



It is clear that the crosses and circles do tend to lie along a line 



