178 THOMPSON YATES LABORATORIES REPORT 
Table I 
East 
Indians 
Neg 
Nativ 
ROES 
sB.G. 
Aboriginals 
Chi 
NESE 
Portuguese 
Immigrant 
Negroes 
Europeans 
"8 
"S 
"5 
-a 
7! 
■u c 
c 
C 
c 
0 S 
1 | 
Pigm. 
1 | 
£ 
1 
s 
1 1 
Pigme 
Pigm( 
1 £ 
.£? 
Pigme 
1 | 
Pigme 
.5? 
Pigme 
Number of Cases . 
345 
80 
171 
57 
9 
4 
6 
37 
3 
63 
12 
7 
Percentages, 5 ozs. & under 
4'9 
I 1-2 
33"9 
35-2 
5-2 
16-6 
5'4 
46-1 
31-9 
25-5 
„ 10 ozs. „ 
18-5 
3^5 
47-3 
42-6 
22-2 
25 
36-8 
33'3 
3° 
33'3 
3 2 '3 
41-2 
41-6 
„ 1 5 ozs. „ 
2 4 
237 
9-9 
14-8 
III 
157 
33"3 
16-2 
6-i 
I4-2 
8-3 
57-1 
„ 20 ozs. „ 
15-6 
20 
6-4 
5'5 
22"2 
5° 
2 1 
1 6-6 
2 4'3 
I 2'2 
6-3 
1 6-6 
14-2 
„ 25 ozs. ,, 
127 
2 "5 
12 
I I • I 
8-i 
47 
14-2 
9-8 
2-5 
5° 
1 -9 
22'2 
5-2 
8-i 
14-2 
„ 40 ozs. „ 
5-2 
5 
•58 
157 
27 
66-6 
i-6 
,, 50 ozs. „ 
5-5 
2 5 
27 
„ 60 ozs. „ 
2 
„ over 60 ozs. 
2 
2-5 
in 
27 
Of the races represented, the Aboriginal American Indians, the Chinese, and 
Portuguese are represented in too small numbers to be of much value in themselves, 
but it is seen that they correspond to the Indian type and not to the Negro. 
The two last columns differ from the others in that they represent races 
exposed to malarial infection in adult life only, such as the Immigrant Negroes from 
Barbados and other non-malarial West Indian Islands. 
The age incidence amongst adults is represented in the following table ; but 
at these ages, twenty and over, recent malarial attacks are rare as shown by the rarity 
of recent malarial pigmentation, and therefore this table does not show the effects of 
recent attacks. 
Table II 
Race 
E. Indian 
Native 
Negroes 
Immigrant Negroes 
Ages 
Not 
Pigmented 
Pigmented 
Not 
Pigmented 
Pigmented 
Not 
Pigmented 
Pigmented 
20-2 5 
10 oz. and under 
Over 10 oz. 
33'3 
66-6 
49'9 
50-I 
75 
25 
7' 
28-9 
66-6 
33'3 
475 
S 2- 5 
26-45 
1 0 oz. and under 
Over 10 oz. 
17-9 
82-1 
39 -6 
60-4 
86-4 
13-6 
80 
20 
85-4 
14.6 
79"9 
19-9 
Over 45 
10 oz. and under 
Over 10 oz. 
37'4 
62-6 
60 
40 
8i- 9 
18 
9 2'2 
7 -6 
74'5 
25-5 
100 
