﻿168 



Cincinnati Society of Natural History. 



arrangement of chords, or a false note in a melody, is instantly perceived 

 and instantly resented. We must fix our standard of colors by careful 

 study of the spectrum. 



If the colors, as obtained from the analysis of the solar spectrum, be 

 arranged on a circular disk, and the proper superficial extent of surface 

 be given to each color, by rapidly whirling the disk, the colors recombine 

 and will produce white; each set of any two primaries will have the proper 

 secondary between them, and the colors pass round and round the circle, 

 conforming to the law for mixing colors. The colors will be found to 

 conform in relative position to the following figure : 



Diagram of the relative superficial areas and angular spaces to be given to each color, 

 in order to form an harmonious combination. 



J. W. A. 



I will now give you some diagrams which, in a condensed manner, will 

 display the classification and combination of the colors, which may be 

 analyzed into an infinite number. Yellow is akin to light, and blue to 

 darkness, while red is the transition color. If you add yellow to any color, 

 it renders it paler; and blue darkens the tint. 



In the following diagrams, you will find the lighter colors in the upper- 

 most line, the transition colors in the middle line, and the darkest in the 

 lowest line. The Roman numerals designate the order of position : 



