28 
Pigmentation, Susceptibility mid Race Selection 
TABLE XI. Hair Colour. Showing the Number of Patients, the Per- 
centage of Severe Cases and the Percentage of Deaths in the various 
Hair Colours in the diseases considered. 
Black 
Dark 
Medium 
Fair 
Red 
Scarlet Fever : 
Number of cases 
12 
289 
1109 
360 
94 
Percentage of severe cases ... 
8-3 
14-2 
17-4 
20-3 
19-2 
Percentage of deaths 
o-o 
2-1 
3-2 
5 3 
3-2 
Diphtheria : 
Number of cases 
1 
97 
404 
169 
29 
Percentage of severe cases ... 
o-o 
32-0 
40-1 
39-6 
41-4 
Percentage of deaths 
o-o 
93 
10-6 
12-4 
34 
Measles : 
Number of cases 
0 
85 
367 
184 
25 
Percentage of severe cases . . . 
o-o 
16-4 
16-4 
23-9 
20-0 
Percentage of deaths 
o-o 
4-7 
7-7 
13-6 
12-0 
Whooping Cough : 
Number of cases 
2 
35 
190 
73 
10 
Percentage of severe cases ... 
0 
11-4 
20 
21-9 
10-0 
Percentage of deaths 
0 
o-o 
10 
13-7 
10-0 
dark and jet black-haired children. This position is changed in diphtheria, where 
the fair-haired children have a slightly smaller percentage of severe cases and 
red-haired children a smaller percentage of deaths, and in whooping cough where 
the red-haired have a smaller percentage of severe cases. As with the fair-haired 
the position of the dark and jet black-haired children is marked and constant, but 
in their case in respect of smaller severity and death rates. The only exception is 
the lower death rate in diphtheria and the lower severity rate in whooping cough 
among red-haired children. 
To sum up, the dark and jet black-haired child occupies one pole, the pole of 
less severity and mortality, the fair-haired and, to a less degree, the red-haired 
child occupies the other pole, the pole of greater severity and mortality, while 
the mean is represented by the medium-haired child. This will be seen con- 
veniently in Table XII, giving the hair colours in order of ascending severity 
and death rates in the different diseases considered. 
2. Recuperative Power and Pigmentation of the Eyes. Taking into con- 
sideration the conclusions drawn between the severity and mortality of the 
diseases and the pigmentation of the hair, it should follow by analogy that the 
dark-eyed and the light and blue-eyed children should occupy the extreme 
poles, the dark-eyed that of less severity and mortality and the light and 
blue-eyed that of greater severity and mortality, with the medium-eyed 
children representing the mean. As will be seen from Table XIII this would 
hardly be accurate in detail. On the other hand, if we group together the 
