Memoirs National Academy of Sciences XV. 



Part I, PI. 7. 



GROUP EXAMINATION BETA, WITH NEGRO RECRUITS. 



Examiner is at the left, demonstrator at the light, of the beta blackboard. The white geometrical chart at the right of the 

 blackboard was used with test 7 for a time and then abandoned. 



SCORING EXAMINATION PAPERS. THE SCORERS ARE WORKING AT MESS TABLES ON EXAMINATION ALPHA. 



