9 
as examples of his Nomenclature of Co- 
lours. He copied the colours of these 
minerals, and found the component parts 
of each tint, as mentioned by Werner, 
uncommonly correct. Werner's suites 
of colours extend to seventy-nine tints. 
Though these may answer for the de- 
scription of most minerals, they would 
be found defective when applied to ge- 
neral science : the number therefore is 
extended to one hundred and ten, com- 
prehending the most common colours or 
tints that appear in nature. These may 
be called standard colours ; and if the 
terms pale, deep, dark, bright, and dull, 
be applied to any of the standard colours, 
I 
