News, Notes, and Reviews 
173 
plates I-XII dulled by 32 per cent, of neutral gray; plates XXXII- 
XXXVIII are dulled by 58 per cent, of neutral gray; plates 
XXXIX-XLIV are dulled by 77 per cent, of neutral gray ; plates 
XLV-L are dulled by 90 per cent, of neutral gray; and plates 
LI-LIII are dulled by 95.5 per cent, of neutral gray. If the 
color to be matched is darker than in the first series of plates, 
turn to the same position in the succeeding 5 series of plates until 
one is found that is dark enough to match. This is readily done 
by referring to the numbers at the head of the vertical columns 
and to the letters at the left of the horizontal rows. In number- 
ing and lettering the rows of colors, every other number and 
letter has been omitted so that colors that do not exactly match 
any in the present work, but are intermediate, can be designated 
by a symbol. For example, in plate I the vertical columns are 
I, 3, and 5; the tints b, d, and f; and the shades i, k, and m. 
All the colors are named as well as symbolized, but if a given 
color comes between Hermosa Pink (if) and Eosine Pink (id) 
it could be designated i e. In this manner about 2385 additional 
colors or a total of 3500 can be designated. Undoubtedly excep- 
tion will be taken to some of the names, but in this the personal 
equation plays such a large part that decisions must be rather 
arbitrarily rendered. The primary colors have been standard- 
ized by Dr. P. G. Nutting, of the U. S. Bureau of Standards. 
It was originally expected that six months would suffice for 
the preparation of the colors, but unforeseen difficulties in repro- 
duction have extended this period to about three years. 
A list of color synonyms as shown by the immense list of trade 
samples that must have accumulated would have formed an ex- 
ceedingly interesting and valuable addition to the work. 
A table of percentages of color, together with an explanation 
of the amount of white, black, or neutral gray used as above, will 
give an approximately ready clue to the reproduction of any color 
in the guide, the only uncertain factor being the possible lack of 
standardized primary colors with which to begin. 
Definitions of the principal color terms, such as color, shade, 
tint, hue, tone, etc., which are used almost interchangeably by 
many people, will repay careful study by those not familiar with 
their exact use. 
