STUDIES IN SPECIAL SENSE PHYSIOLOGY 417 



"... Rooms which are hung with pure blue appear in some 

 degree larger, but at the same time empty and cold. 



" The appearance of objects seen through a blue glass is gloomy 

 and melancholy." ( 26 ) 



How far these results depend on mental factors, e.g. an asso- 

 ciation of ideas, cannot be discussed in this place ; it is sufficient 

 to recognise their existence. 



In the opinion of those whose theories we are examining, 

 the facts are most satisfactorily described by saying that in 

 any sensation - complex blue and green produce a darkening, 

 and yellow or red a brightening effect ; the toneless colours, 

 black and white, also contribute respectively in a negative or 

 positive sense to the sum total of effects. We have, there- 

 fore, the brightness of a colour defined in strictly sensational 

 terms. 



We have now arrived at the conception of six primary sensa- 

 tion qualities arranged in three pairs white-black, red-green, 

 yellow-blue. The first member in each case increases, the second 

 diminishes the subjective intensity or brightness of a sensation- 

 complex of which it forms part. 1 



" The brightness or darkness of a toned (bunte) colour is, 

 according to this view, the result of the inherent brightness or 

 darkness (Eigenhell und Eigendunkel) of its constituent pure 

 colours, which as the pure constituents of that colour agreeably 

 to their respective distinctness determine the quality of the colour. 

 In any colour really existent for us is a definite inherent degree 

 of brightness and darkness., and in accordance -with whether the 

 brightness or the darkness be the more distinct, we call (the colour) 

 bright or dark. 



" A toned colour may generally be regarded as made up of 

 four primary components, two toned and two tone-free (black and 

 white). Only in colours of the tone of a pure colour is one toned 

 constituent present by itself. In any red-yellow colour, e.g. orange, 

 we have accordingly to distinguish three bright, pure components 

 (red, yellow, white), and one dark (black) ; but in any green-blue, 

 three dark (green, blue, black) and one bright. The red-green 

 and green-yellow colours would contain, however, two bright and 

 two dark pure components. 



;-;iti-n-C\implrx is :i it-nil usril incn-ly to indicate the supposed multiplicity 

 of infra-conscious representatives, not in H perceptual sense. 



2D 



