The Sense of Sight : Color Vision 141 



TABLE 17 

 LIGHT BLUE -ORANGE TESTS IN COLOR DISCRIMINATION Box 



choosing the blue of the series because it seemed brighter 

 than the orange, this substitution might mislead it into choos- 

 ing the orange. These blues are referred to in the table 

 as light blue (tint No. i) and dark blue (standard blue). 

 Again a change in the opposite direction was made by sub- 

 stituting Bradley red for orange. As this was for the human 



