LIGHT DISCRIMINATION IN THE ENGLISH SPARROW 



105 



TABLE VIII 



All records for the day before and the day after a forty-eight hour interval. The 

 day before was usually Saturday; the day after Monday. The average for the day 

 after is in every case greater than that for the day before the long interval. 



Difference between Saturday and Monday record. 

 1.83 5.54 1.00 



3.00 



