62 



COLOR SENSITIVITY OF THE PERIPHERAL RETINA. 



The following table shows the numerical results in detail : 

 Outermost limits of the four color zones.* 



*It should perhaps be mentioned that this series of determinations was made toward the 

 close of the investigation. Before these experiments were entered upon, all five observers had 

 had some months' experience with color-stimuli applied to the horizontal meridian of the 

 retina (the out and in meridians of the above table). It is probable that this preliminary train- 

 ing brought about a refinement of color discrimination upon the "out" and "in" meridian, 

 and that the zonal determinations of our table extend beyond the normal limits in these two 

 directions. 



