to particular Colours. 157 



Colours to^an ordinary eye. Colours to Mr ~— — 's eye. 



White, Blue. 



Pale brick red, Yellow. 



Indigo, Blue. 



Yellow, Yellow. 



The following colours in the first column are complementa- 

 ry to those in the first column of the preceding table. 

 Colours to an ordinary eye. Colours to Mr " 's eye. 



Blue green, Blue. 



Pale ruddy pink, Yellow. 



Blue, Blue. 



Fiery-orange, Yellow. 



White, Blue. 



Pale yellow, Yellow. 



Indigo, Blue. 



It appears by this that the eyes of the individual in question 

 are only capable of fully appreciating blue and yellow tints, 

 and that these names uniformly correspond in his nomencla- 

 ture to the more and less refrangible rays generally ; all which 

 belong to the former, indifferently, exciting a sense of " blue- 

 ness," and to the latter of " yellowness." Mention has been 

 made of individuals seeing well in other respects, but devoid 

 altogether of the sense of colour, distinguishing different tints 

 only as brighter or darker one than another ; but the case is 

 probably one of extremely rare occurrence." 



In examining the preceding tables, we observe some results 

 which we think require elucidation. These are principally 

 such as relate to the whites, which stand thus : 

 Colour to an ordinary eye. Colour to Mr 's eye. 



White, Yellow. 



White, Very little colour. 



White, White. 



White, Blue. 



White, White, with a dash of yellow and blue. 



White, White, with blue and yellow in it. 



White, White. 



The examination of this table suggests some important 

 questions. 



1. What would be the colour which results from the union 



