276 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



(<•) 



(« 



(«) 



(d) 



Credit.. 



Time: credit only if accuracy = 5 



1-30 



1-30 



1-30 



31-60 



31-60 



31-60 



61-120 



61-120 



61-120 



61-120 



121-180 | 



T.L. 



121-180 | T.L. 



121-180 



121-180 



T.L. 



T.L. 



Arrangement Cr. for Arr. Score Wtd.Sc. 



(a) 



(« 



(c) 



l<0 



Fig. 73.— Performance Scale Examination (second page). 



