32 Pigmentation, Susceptibility and Race Selection 
TABLE XVII. Giving from left to right the combined Hair and Eye 
Colours in order of ascending Severity and Death Rates in the diseases 
considered. 
(i) Severity Rates. 
Disease 
Hair and Eye Colour 
Scarlet Fever ... 
Diphtheria 
Measles ... 
Whooping Cough 
Medium medium 
Dark dark 
Dark dark 
Dark dark 
Dark dark 
Medium medium 
Medium medium 
Medium medium 
Fair light 
Fair light 
Fair light 
Fair light 
(ii) Death Rates. 
Disease 
Hair and Eye Colour 
Scarlet Fever ... 
Diphtheria 
Measles ... 
Whooping Cough 
Medium medium 

Dark dark 
Dark dark 
Dark dark 
Dark dark 
Medium medium 
Medium medium 
Medium medium 
Fair light 
Fair light 
Fair light 
Fair light 
From Tables XVI and XVII it is seen that the result is striking. The dark- 
haired dark-eyed children occupy one pole, that of less severity and lower mortality; 
the fair-haired light-eyed children occupy the opposite pole, that of greater severity 
and greater mortality, and not only is this so but the greater severity and greater 
mortality in the fair-haired light-eyed child is marked and constant in each of the 
diseases considered. The medium-haired medium-eyed child occupies the mean 
between these poles. The only exceptions are found in measles where the medium- 
haired medium-eyed children show a smaller percentage of severe cases, and in 
diphtheria where they show a slightly smaller percentage of deaths than the 
dark-haired dark-eyed children. 
It has been found then that the dark and jet black- haired children oppose 
greater resistance to the diseases than the red-haired children and, even more 
so, than the fair-haired children, while the medium-haired children occupy an 
intermediate position. It has also been seen that the medium and dark-eyed 
children are less severely attacked than the light and blue-eyed children and, 
further, that combining the hair and eye colours the dark-haired dark-eyed 
children show considerably more resistance to the diseases than the fair-haired 
light-eyed children, with the medium-haired medium-eyed children occupying 
an intermediate position. 
From this it must be concluded that the dark-haired dark-eyed type have 
higher recuperative powers and offer greater resistance to the diseases than the 
fair-haired light-eyed type, and that, in the various gradations between the 
extreme dark and extreme fair types, the closer the type approximates to fair, 
