14 Color Standards and Nomenclature. 
lished through common usage. This very important 
consideration has induced the author to retain such of 
the old standards as can be matched in the present work, 
even though some of them do not agree strictly with 
either his own or the usual conception of the colors in 
question. An asterisk (*) preceding a color name in¬ 
dicates that the name in question is adopted from the 
older work, the variation between different copies of the 
work requiring the selection, in the new one, of a color rep¬ 
resenting as nearly as possible an average of the former. 
In any systematically arranged scheme, unless the 
number of colors shown is practically unlimited, it will, 
necessarily, be impossible to find represented thereon a 
certain proportion of colors comprised among even a 
very limited number selected at random, or only rough¬ 
ly classified. Hence many (thirty-six, or more than 
five per cent.) of the colors shown in the old “Nomen¬ 
clature of Colors” fall into the blank intervals of the 
present work, being intermediate either in hue or tone, 
or chroma, sometimes all. It is necessary of course to 
provide some means for the correlation of these with the 
present scheme, which, is done by the list on page 41, 
where the positiou of each is shown. 
The question of giving representations of metallic 
colors in this work was at one time considered; but the 
idea was abandoned for the reason that these are in 
reality only ordinary colors reflected from a metallic or 
burnished surface, or appearing as if so reflected; the 
actual hue is precisely the same, though often change¬ 
able according to angle of impact of the light rays, and 
relative position of the eye, this changeableness being 
sometimes due to interference.* Colors again vary, 
without actual difference of hue, in regard to quality of 
texture or surface; that is to say, the color may be quite 
*See Rood, Modern Chromatics, pages 50-52. 
