SELIG HECHT 



671 



§ 



I 



I 

 I 



iJ.S 



3.0 



2,6 



e.o 



AS 



f.O 



/^' 



15° eo'' 



Temperature 



^5" 



Fig. 1. Temperature and latent period. The animals were exposed to an in- 

 tensity of 400 meter candles for 0.078 second by means of a camera shutter. 

 The latent period is the time during which the animals were actually in the 

 dark. Since the exposure is so very short, the reaction time as measured with 

 a stop-watch may be considered entirely as the latent period. The points repre- 

 sent single, individual readings for the three animals of this experiment. 



