BLACKWATER FEVER 195 
The following is the order ot mortality from malaria per thousand deaths 
from other causes, and occurrence of Blackwater : — 
1 
2 
3 
4 
5 
Arkansas ... 
1 c8 
1 1 1 
Blackwater 
Mississippi 
rr 
1 3 3 
106 
78 
Blackwater 
Louisiana ... 
1 20 
1 10 
61 
Blackwater 
'.Tennessee 
QX 
7 + 
64 
T 
26 
3 ± 
JT 
Blackwater ? 
Texas ... ... 
8q 
7 
86 
24. 
T 
Blackwater 
Oklahoma 
Florida 
75 
Blackwater 
Georgia 
74. 
1 T 
J J 
18 
Blackwater 
North Carolina 
67 
29 
6 
Blackwater 
Alabama ... 
66 
62 
4 1 
Blackwater 
South Carolina 
58 
J 
46 
T 
TJ 
Blackwater 
Arizona 
■n 3 
Virginia ... 
4.7 
T/ 
3-1- 
J T 
1 I 
Blackwater 
Kentucky ... 
46 
2 7 
2 5 
1 5 
Washington 
4.0 
T 
1 0 
Illinois 
4. 
T 
1 7 
Missouri ... 
37 
36 
25 
20 
Kansas 
35 
27 
... 
New Mexico 
3+ 
' + 
Indiana 
Nevada 
H 
Etc., etc.... 
Wisconsin 
1 
Thus with two exceptions we have an accurate correspondence between the 
distribution of blackwater fever and severe malaria. Whether Oklahoma and Arizona 
are real exceptions, or whether it is simply that blackwater, though existent there, has 
not been recorded, 1 have no means of determining. If now, we plot out these figures 
on the map, we see that blackwater fever is confined to a region below the 37th parallel, 
