In the following table is given the number of cases and deaths 
from typhoid fever in the District of Columbia reported by months to 
the health office during the calendar years 1906 and 1907 : 
Month. 
Cases. 
Deaths. 
White. 
Colored. 
Total. 
White. 
Colored. 
Total. 
1906. 
1907. 
1906. 
1907. 
1 1906. 
' 1907. 
1906. 
1907. 
1906. 
1907. 
1906. 
; 1907. 
January. ... 
24 
46 
3 
7 
27 
53 
5 
6 
1 
1 
6 
7 
February __ _ 
15 
28 
6 
4 
21 
32 
2 
- 3 
2 
3 
4 
6 
March 
13 
23 
5 
2 
18 
25 
2 
2 
3 
2 
5 
4 
April ... 
2Q 
20 
6 
8 
35 
28 
2 
3 
2 
3 
4 
6 
May _ ... 
31 
31 
13 
6 
44 
37 
6 
5 
4 
2 ' 
10 
7 
June 
32 
30 
26 
4 
.58 
34 
4 
1 
5 
1 
9 
2 
July 
123 
61 
.58 
21 
181 
82 
7 
6 
14 
4 
21 
10 
August _ - _ . 
200 
14.5 
93 
46 
293 
191 
15 
13 
17 
5 
32 
IS 
September. 
105 
146 
44 
41 
150 
187 
10 
13 
10 
4 
20 
17 
October . 
129 
102 
43 
47 
in 
149 
16 
12 
12 
7 
28 
19 
November 
57 
68 
25 
19 
82 
87 
11 
8 
8 
3 
19 
11 
December .. _ . ... 
38 
35 
8 
5 
46 
40 
2 
5 
2 
2 
4 
7 
Total . . 
796 
735 
330 
210 
1 
1,126 
1 
945 
82 
- 
80 
37 
162 
114 
As this table gives the cases by date of report of cases to the 
health office, which date is usually two or three weeks (and often 
more) subsequent to the onset of illness, and as it includes imported 
cases, it shows but roughly the actual progress of the disease in the 
District of Columbia. Table on page 19 is much more accurate in 
this respect. The above table shows that the number of cases and 
deaths from typhoid fever reported among the negroes in 1907 was 
mudi smaller than in 1906, a large part of the difference in total 
cases and deaths for the two years being due to the lower rate for 
the negroes in 1907. It is interesting to note that the dispropor- 
tionately small number of colored to white cases in 1907 was among 
cases reported in the winter, spring, early summer, and late fall 
months — that is, out of the season in which typhoid fever has in the 
District of Columbia its greatest prevalence (by report of cases), 
namely, in July, August, September, and October. Thus, in 1907 
there were reported in the eight months of January, February, 
March, April, May, June, Xovember, and December 281 white cases 
and 58 colored cases, or a ratio of 1 colored to 1.8 white cases, while 
in the four months of July, August, September, and October there 
were reported ISI white and 155 colored cases, a ratio of 1 colored 
to 2.9 white cases. 
In 1906 there was no such striking difference in the proportion of 
colored to white cases for the two corresponding portions of the year. 
Thus, in the eight months of January, February, March, A^Dril, May, 
June, Xovember, and December, 1906, there were reported 239 white 
