; 



RAYMOND PEARL. 



TABLE II. 



SHOWING THE CLASSIFICATION OF THE KERNELS OF EAR No. 8 BY THE DIFFERENT 



OBSERVERS. 



Another of the five (No. V.) adds to the special training of the 

 zoologist that of the philosopher and psychologist, which by 

 traditional standards, at least, ought to aid in the development 

 of a discriminative judgment. The training of two of the ob- 

 servers (Nos. III. and IV.) has been agricultural. Further, both 

 of these men belong by birth, early life and education to the 

 "corn belt" section of the country, and arc thoroughly and 

 intimately familiar with maize. They have had experience in 

 corn judging, which demands the appreciation of very small 

 differences in ear characters. Observer No. X., while not a 

 scientific student of breeding, has had successful practical expe- 

 rience in corn breeding, and is a careful observer. Observer 

 No. IX. has been specially trainrd in biometric work in the 

 writer's laboratory and has had considerable experience in meas- 

 uring, sorting small variations out of mixed material, and similar 



work. 



RESULTS. 



I. 



The results of the counts of the four ears by the different 

 observers are set forth in Tables II. to V. inclusive. Each oi 



