^jF* — -m 



22 



A NOMENCLATURE OF COLOES. 



It seems scarcely necessary to include the so-called 

 gold and silver colors in the above classification, since 

 they are nearly related, or at least analogous, to yellow 

 and white respectively, the difference consisting chiefly 

 in the existence of a metallic medium or surface. 



Observing the colors of the solar spectrum, it is obvious 

 that each secondary color grades insensibly into the two 

 primaries composing it, and that thus results an unbroken 

 transition from one end of the series to the other. The 

 transitions may be shown by the following sequence, 

 the names of the primary colors being given in heavy- 

 faced type (and also preceded by a Eoman numeral) and 

 those of the secondary colors in italics. 



Spectrum Series. 

 I. 1. Red. 



2. Orange-red. 



3. Eeddish orange. 



4. Orange. 



5. Yellowish orange. 



6. Orange-yellow. 

 II. 7. Yellow. 



8. Greenish yellow. 



9. Yellowish green. 



10. Green. 



11. Bluish green. 



12. Greenish blue. 

 III. 13. Blue. 



14. Purplish blue. 



15. Bluish purple. 



16. Purple. 



17. Eeddish purple. 



18. Purplish red. 



Not only is the transition complete from nos. 1 to 18, 

 but could the names be arranged in the form of a circle, 



