134 Pigmentation Survey of School Children in Scotland 
TABLE l— {continued). 
Analytical Table for Eye Colours. 
Pore Blue 
The eye.s are pure 
blue 
Not Pure Blue 
The eyes are not pure blue. They arc either brown, grey, 
very light blue, or mixed 
Deep blue or pure 
blue iti 
Class 1. 
( Light blue is) 
1 Class 2. ) 
Dark 
The eyes are hazel 
brown, dark lirown, 
or simply dark 
Class 4. 
Not Dark 
The eyes are not brown. They are either 
grey or mixed. 
The grey eyes may be either very light 
blue, light grey, or simply grey. Light 
grey eyes belong to Class 2, while grey 
and mixed belong to Class 3 
Light 
The eyes arc light 
grey, very light 
blue, or bluish grey. 
Class 2. 
Medium 
The eyes are neither 
light grey, very light 
blue, nor bluish 
grey, but are either 
grey, greenish, 
orange, very light 
hazel, or mixed. 
They belong to 
Class 3. 
Note. — There arc four classes or divisions of eyes. 
No. 1. — The first is the pure lilue or deep blue eye which cannot be mistaken. 
No. 2. — The second includes light blue and light grey eyes. 
No. 3. — The third includes all eyes not blue, light grey, or brown — they are called medium 
eyes, and include grey, green, orange, and other mixed shades. 
No. 4. — The fourth class includes hazel brown, dark brown, and dark eyes generally. The 
fourth class is usually spoken of as dark, and the colour appears homogeneous in 
character at a distance of two feet, at which distance observations ought to 
be made. 
In noting the colour of the eyes, first note whether they are blue or brown. If these are 
excluded note whether they are grey. If light grey, they are light eyes, if grey, they are medium 
eyes. If the eyes are neither blue (1), grey (3), nor brown (4) they are cither light eyes (2) or 
medium eyes (3) [of which grey, previously mentioned, is only one shade]. Light eyes having 
been already excluded, they are medium or mixed eyes. It is best to call up a few children at a 
time and judge hi/ comparison. 
fully described. In making colour observations, each class in this table is de- 
terminable by the observer by a process of elimination of the other classes. The 
results obtained by the use of this table were now compared with the results 
obtained by using samples of hair, for hair colour, and of glass eyes, for eye colour 
and also with the results, for eye coloui", obtained from observations on boys and girls 
selected as types of each class. It was found that both sets of figures closely agreed, 
and the results were therefore considered very satisfactory. The colour card method 
