COLOR SENSITIVITY OF THE PERIPHERAL RETINA. $5 



each phase estimated. Thus, OY.J^ Y. 1 /^ W. indicates that 

 the first phase lasted about one-eighth of the three-second 

 period, and the second phase persisted for about half of the 

 period ; the W. phase occupied the remainder of the three 

 seconds.) 



40. RO. YO. Gray. B. (The B. was slightly longer than any 

 other phase.) 



30- R- O. Y. W. B. (The blue phase persisted longer than 

 any other.) 



20. R._ RO. Y. Gray. 



10. R.%._ O. Y. Yellowish-gray. 



. W. 

 W. 



.-^W. Bluish. 

 OY. Y. Gray. Bluish. 

 - Y.J4. W. 



STIMULUS Y. 60. 

 50. 

 40. 

 30. 

 20. 



STIMULUS O. oo. 

 80. 

 70. 

 60. 

 50. 

 40. 

 30. 

 20. 

 10. 



STIMULUS G. 85. 

 75- 

 65- 

 55- 

 45- 

 35- 

 25- 

 15- 



STIMULUS B. 90. 

 80. 

 70. 

 60. 

 50. 

 40. 

 30. 



20. 



10. 



STIMULUS V. oo. 

 80. 

 70. 

 60. 

 50. 

 40. 

 30 

 20. 

 10. 



STIMULUS P. 85. Gray. No change. 



75. Yellowish. Gray. 



65. OY. Yellowish. Gray. 



55. OY. Yellowish. Gray. 



45- OY. Y. Yellowish. 



35- OR. O. Y. 



25. R. OR. Orangish. 



15. P. R. Orangish. 



(Y. had the best saturation.) 



Y. Yellowish. Gray Y$- 

 OY. Y. Gray. 

 OY. Y. Yellowish. 

 YO.^.Y. Yellowish-gray. 

 YO.y 2 . OY. Y. Gray. 

 O.y 2 . OY. Y. Gray. 

 Rich O. YO. Y. 

 RO. O. OY. Y. 

 RO.%.-Y. 



Gray. No change. 



Yel lo w i sh. Gray. 



Y. Gray. Bluish. 



Y. Gray Pale Bluish. 



Y. Gray. 



Y. Brownish. Gray. Bluish. 



YG. Y. Gray. Bluish. 



G. YG. 



Gray. No change. 



Gray. No change. 



Gray. No change. 



Bluish. Gray. 



Bluish. Gray. 



B. Bluish. Gray. 



B.^. Gray. Yellowish. 



B.^2. Gray. Slow and gradual decrease of saturation. 



B.%. Bluish-gray. Slow and gradual decrease of saturation. 



Gray. No change. 

 Gray. No change. 

 Gray. No change. 

 Gray. Darker Gray. 

 Bluish. Gray. 

 Bluish. Gray. 

 B + ?. B. Bluish. 

 VB.^.B. Bluish. 

 V. VB. B. 



