3GG 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



It will be found that this system works just as well if we turn it 

 upside down. In doing this the relation of the color scales to the value 

 scale is reversed, as in the following diagram: — 



B 



<; 



Intensity R 



B 



Light 



"White 



P7 G 

 R 6 B 



Y 5 V 



4 

 3 



2 



1 

 

 1 

 •2 

 3 

 4 



R 



J t. Complementary 



Y Intensity 



R 



G 



R 6 B 



V 7 V 



8 



Black 



Darkness 



The diagrams which have been given show systems in which the colors 

 red and l>lue are the dominant colors, having the greatest intensity. 

 Predominance might be given to yellow and violet, or to purple and green, 

 or we might bring the point of intensity b< tween two pairs of comple- 

 mentaries. In that case we should have four colors as dominants, all 

 equally intense. Every change of the dominants means, of course, a 

 change of the whole system. The system may lie changed in other 

 ways. We can raise or lower its pitch within the extremes of white 



and black, thus : — 



