^^•^^w^ 
12 
position colour whatever, and in this 
work Orange and Purple are named, and 
arranged in distinct places. To accom- 
plish which, it was necessary to change 
the places of two or three of Werner's 
colours, and alter the names of a few 
more ; but, to avoid any mistake, the 
letter W. is placed opposite to all Wer- 
ner's colours. Those colours in Werner's 
suites, whose places or names are changed, 
are also explained, by placing Werner's 
term opposite to the name given, which 
was found more appropriate to the com- 
ponent parts of the changed colours. 
Those who have paid any attention to 
colours, must be aware that it is very 
