366 PROCEEDINGS OF THE AMERICAN ACADEMY. 



It will be fouud 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 : — 



Light 

 White 



8 



P7 G 



KGB 



Y 5 V 



G 4 P 



B 3 R 



V 2 Y 



Intensity R^ ^B Complementary 



■^ y J Y Intensity 



G 2 P 



B 3 R 



V 4 Y 



P 5 G 



R C) B 



Y 7 V 



8 



Black 

 Darkness 



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

 red and blue 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 between 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 inay be changed in other 

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

 and black, thus : — 



