1904.
Curves of Rat and Human Plague.-July 31st, 1903, to August 4th, 1904.
HEALTH DISTRICT X.
35.2
42.7
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21|22|28 24|25|26 27 28 29 30 31
1903.
WEEKS.
32
30
28
26
24
22
20
Percentage of
18
Infected
16
Rats on Total
14
caught.
12
10
6
4
2
L
28
26
24
22
20
18
16
14
12
10
8
Number of
Plague Cases.
WEEKS.
www
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52≥1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
N O
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