January February March
A
April
May June July
August
September
October
November
December
·
DIPHTHERIA CASES NOTIFIED DURING EACH MONTH OF THE YEARS 1912 TO 1921 INCLUSIVE.
Month.
1912. 1913, 1914. 1915. 1916.
1915. 1916. 1917. 1918 1919. 1920. 1921. Total.
15
15
21
4
16
+
·
•
25
2
13
6
12
6
27
6
11
11
16
12 17
4
7
7
13
55
9
10
3
6
15
...
4
4
4
6
13
13
4
14
17
3
10
7
6
17
9
11
9
19
8
11
12 13
Total...
38 148
78
86
101
Chinese
24
75
47
70
69
118
50 · 76 85
80
62
109
39
42
2123
12 132
87
97
78
38
47
48
28
3
29
62
17
87
116
849
47 595
M 50
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