58 COLOR SENSITIVITY OF THE PERIPHERAL RETINA. 



Y. 80 Gray. 

 TO Yellowish. 

 60 Yellow. 

 50 Yellow. 

 70 Blue. 

 80 Bluish. 



G. 65 Gray. 

 55 Yellow. 

 45 Bluish. 

 35 Blue. 

 65 Blue. 



V. 



65 Bluish. 

 60 Bluish. 

 55 Blue. 

 50 Gray. 

 45 Yellow. 

 65 Yellow. 

 60 Yellow. 



80 Gray. 

 70 Gray. 

 60 Bluish. 

 50 Blue. 

 40 Blue. 

 80 Yellowish. 

 70 Yellowish. 



85 Gray. 

 75 Gray. 

 65 Yellowish. 

 55 Bluish. 

 45 Blue. 

 85 Blue. 

 75 Bluish, 



Y. 65 Yellowish. 

 55 Yellow. 

 45 Blue. 

 35 Blue. 



Rest of five min utes in darkness. 

 35 Yellow. 

 45 Yellow. 



40 Yellowish. 

 35 Green. 

 30 Reddish. 

 25 Reddish. 



Rest. 

 30 Green. 



Rest. 

 25 Green. 



G. 60 Yellow. G. 



50 Yellowish. 

 40 Blue. 

 30 Blue. 

 20 Bluish. 

 10 Green. 



Rest. 



40 Yellow. 

 30 Yellow. 



B. 65 Bluish. B. 65 Gray. 



55 Bluish. 

 45 Blue. 

 35 Bluish. 

 25 Yellow. 



Rest. 

 35 Blue. 

 25 Blue. 



V. 55 Blue. 

 45 Blue. 

 35 Gray+?. 

 25 Yellow. 



Rest. 

 35 Blue. 

 25 Blue. 



P. 85 Gray. P. 60 Yellow. P. 



50 Yellow. 

 40 Grayish. 

 30 Bluish. 

 20 Blue. 

 10 Violetish Purple. 



Rest. 



40 Orange. 

 30 Orange Red. r< 



Rest. 



20 Purple Red. 

 10 Purple. 



That the appearance of the complementary color in these experi- 

 ments is wholly due to a failure to maintain a constant condition of ret- 

 inal adaptation, there can be little doubt ; for the irregularity invariably 

 disappears when the eye is rested for a time in complete darkness. 



A surprising fact in connection with these after-effects w r as the 

 observer's utter ignorance of their existence. They were not attended 

 by after-images nor by any other conscious datum. Pauses were fre- 

 quently made and the observer was asked to be on the lookout for 



50 Yellow. 



40 Yellow. 



30 Red. 



20 Greenish Blue. 



Rest. 

 20 Purple. 



