26 



A NOMENCLATURE OF COLORS. 



complications. In order to make comparison of allied 

 shades and tints more easy, it has been endeavored to 

 place all belonging to a particular class together on one 

 plate ; but in not a few cases it has been a difficult mat- 

 ter to decide upon which plate a certain one should be 

 put, the decision being in some instances almost purely 

 arbitrary. 



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