218 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



EXAMINATION (X 



Number Comparison 



Form C 



Samples 



87 66 

 68 26 



Here I 

 92 

 46 

 83 

 25 



Form D 



Sample* 



Form E. 



Fig. 17 — Group Examinations a and 6, Four Forms, Test 10, Number Comparison. 



