114 



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-LI 1 1 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 numbering 

 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/; 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 (i/) and eosine pink (id) it 

 could be designated i e. In this manner about 2,385 additional 

 colors or a total of 3,500 can be designated. Undoubtedly 

 exception 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 

 standardized by Dr. P. G. Nutting of the U. S. Bureau of Stan- 

 dards. 



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 

 exceedingly 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 to begin with. 



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. 



