SELIG HECHT 



509 



TABLE I. 

 Data of an Experiment on Dark Adaptation of the Eye. 



I 



V 



I 



2.0 



/O 



fO 20 30 



7/noe — - /^/oafes 



^o 



Fig. 3, Dark adaptation of the eyes of Dr. Schumann, as determined by Piper. 

 Schumann has an anomalous trichromatic vision. 



