24 
Pigmentation, Susceptibility and Race Selection 
This would indicate that the medium-eyed child is more susceptible to scarlet 
fever than the dark-eyed child and, even more so, than the blue and light-eyed 
child. The medium-eyed girl would seem to be more susceptible than the medium- 
eyed boy, the light-eyed girl being less susceptible to a corresponding degree. 
Diphtheria. 
TABLE V. Hair Colour. Showing the Percentages and Numbers of the various 
Hair Colours of Children suffering from Diphtheria, as compared with the 
General Population. 
Black 
Dark 
Medium 
Fair 
Eed 
Totals 
Belvidere and Ruchill : 
Actual numbers ... 
1 
97 
404 
169 
29 
700 
Theoretical numbers 
8 
191 
316 
150 
35 
700 
Actual percentage 
o-i 
13-9 
57-7 
24-1 
4-2 
100 
Theoretical percentage ... 
1-2 
27-2 
45-2 
21-4 
5-0 
100 
In diphtheria medium hair is considerably and fair hair slightly in excess, red 
hair is slightly and dark and jet black hair considerably deficient, compared to 
their proportional representation in the general population. This would indicate 
that the medium-haired child is susceptible to diphtheria to a greater extent 
than, the dark and jet black-haired child to a less extent than, and the red and 
fair-haired child about equally with, its proportional representation in the general 
population. 
TABLE VI. Eye Colour. Shoiving the Percentages and Numbers of the 
various Eye Colours of Children suffering from Diphtheria as com- 
pared with the General Population. 
Dark 
Medium 
Light 
Blue 
Totals 
Belvidere and Ruchill : 
Actual numbers 
106 
311 
247 
36 
700 
Theoretical numbers 
171 
238 
212 
79 
700 
Actual percentage ... 
152 
44-4 
35 3 
5-1 
100 
Theoretical percentage 
24-5 
34-0 
30-3 
11-2 
100 
In diphtheria the medium eye and, to a less extent, the light eye are con- 
siderably in excess, the blue eye and, to a less extent, the dark eye considerably 
deficient, compared to their proportional representation in the general population. 
This would indicate that the medium-eyed child and, to a less extent, the light- 
eyed child is more susceptible to diphtheria than the dark-eyed child and, even 
more so, than the blue-eyed child. 
