iB6 Dr Butter on the msensihiVity of the Eye 
calls green, and green cofours orange; red he considers as 
brown, and brown as red ; blue silk looks to him like pink, and 
pink of a light blue colour ; indigo is described as purple. The 
seven prismatic colours seen in the Spectrum, are described in 
the following manner : 
Colours. 
Colours. 
1. RedjWstaken for 
Brown. 
2. Orange, 
Green, 
3, Yellow, generally known, but sometimes taken for 
Orange. 
4. Green, mistaken for 
Orange4 
<5. Blue, 
Pink. 
6, Indigo. 
Purple. 
7. Violet, 
Purple, 
So that the yellow colour alone is known to a certainty. The 
colours were shewn to him on silk, on feathers, and in Syme’s 
book of colours, with uniform result. Red and brown colours 
appear the same, as well as green and orange, blue and pink, 
and indigo and purple. With the exception of black or white 
objects, which he seldom mistakes, all colours are by him divide 
<ed into three classes, viz. 
Class 1st, Includes red and brown. 
2d, blue, pink, indigo, violet, and purple, 
3d, green and orange colours. 
He can generally say, with certainty, to which of these three 
classes any colour belongs, but he mistakes one colour for ano- 
ther. A difference in the shades of green he can distinguish, 
though not the green colour itself from the orange. Soldiers’ 
scarlet coats appear red. Grass looks green *. The colours of 
horses are quite unknown to him, except a white or black horse. 
A bay, a chesnut, and a brown horse, is described of the same 
colour. The colours of the rainbow or of the Moon, appear 
nearly the same, being twofold ; at least, two distinct colours 
only are seen, which he calls yellow and blue, A blue coat, 
however, he can distinguish from a black, but this circumstance 
may be owing to the metal buttons in the one coat, and not In 
the other ; and a yellow vest is always known to him. By day, 
he called carmine red, lake red, and crimson md puryle^ in Wer- 
* It is remarkable that green, which is the softest of colours, and composed of 
yellow and yue, should be mistaken for orange on every substance except on grctss., 
