30 Pigmentation, Susceptibility and Race Selection 
TABLE XIV. Giving from left to right the Eye Colours in order of 
ascending Severity and Death Rates in the diseases considered. 
(i) Severity Rates. 
Disease 
Eye Colour 
Scarlet Fever 
Diphtheria 
Measles 
Whooping Cough ... 
Blue 
Blue 
Medium 
Medium 
Medium 
Dark 
Dark 
Dark 
Dark 
Medium 
Light 
Light 
Light 
Light 
Blue 
Blue 
(ii) Death 
Rates. 
Disease 
Eye Colour 
Scarlet Fever 
Diphtheria 
Measles 
Whooping Cough ... 
Blue 
Blue 
Dark 
Dark 
Light 
Medium 
Medium 
Medium 
Medium 
Dark 
Dark 
Blue 
Blue 
Light 
Light 
Light 
dark and medium-eyed children and the light and blue-eyed children it is found 
(Table XV) that the dark and medium-eyed group represent the less severity 
and mortality, while the light and blue-eyed group represent the greater severity 
and mortality. The only exception to this is the death rate in diphtheria, which 
is slightly lower in the light and blue-eyed group. When the eye colours are 
considered separately, however, the conclusion is not so definite. The dark-eyed 
child has not the same advantage over the medium-eyed child as the dark-haired 
child has over the medium-haired child. Only in the death rate in scarlet fever is 
there a decided advantage, and there is also a slight advantage in the death rate 
in measles and the severity rate in diphtheria. In the other diseases both the 
severity and death rates are lower in medium-eyed children, but the difference is 
not great. The light-eyed child shows the highest severity and mortality, the only 
exceptions being the severity rate in scarlet fever and measles, which is rather 
lower than in blue-eyed children, and the death rate in diphtheria, which is 
rather lower than in both medium and dark-eyed children. The blue-eyed child 
is not at all constant; in diphtheria and whooping cough it has the smallest 
severity and death rates, whereas in scarlet fever and measles it has the greatest 
percentage of severe cases and, with the exception of light-eyed children, of deaths. 
It would seem therefore, that the advantage is still in favour of the medium and 
dark-eyed children, but that the blue-eyed children are not so liable to severe 
attacks of diphtheria and whooping cough. 
3. Recuperative Poiver and Pigmentation of the Hair and Eyes combined. The 
various combinations of hair and eye colours are so numerous and the number of 
cases in some combinations so small that only the three main ones have been 
