LIGHT DISCRIMINATION IN THE ENGLISH SPARROW 

 TABLE VI— Continued 



97 



The following figures are made from this table. Figures 3 

 and 4 show the number of trials each bird required to learn to 

 discriminate the light at the given intensity. The abscissae 

 indicate the differences of intensity produced by the standard 

 light and the various positions of the variable light. The ordi- 

 nates indicate the number of trials required to learn the dis- 

 crimination. Figure 3 gives the results for Male IV and Female 

 V, both of which were allowed to choose the brighter of the 



